2024 Mercedes-Benz C300 Technical Service Bulletins

314 technical service bulletins (TSBs) are on record for the 2024 Mercedes-Benz C300. TSBs are notes manufacturers send to dealers about repair procedures for issues seen in the field. They are not recalls and do not by themselves mean a vehicle has a fault.

• 11013190Jan 29, 2025Electrical system. Complaint For the potentially affected vehicles, excessively high aging of the battery was calculated at cold battery temperatures (<50°F) and the MIL activated accordingly, even though there is no corresponding high level of aging physically. In this regard, the fault code P0A7F00 "The age limit of the hybrid/high-voltage battery module has been reached" is displayed in the N127 PTCU control unit and/or A66…
• 11013183Jan 28, 2025Suspension. Complaint Creaking noise, in irregular sequence when driving slowly in combination with slight steering movements. Sound file attached for comparison. NOTE: Steering functionality is not affected. For 192 and 232: Only affects vehicles in the below FIN range. FIN range up to: Model series 192: xxx xxx xx 002 876 Model series 232: xxx xxx xx 022 312 Cause Contact area between wheel bearing and steering knuckle.
• 11013192Jan 24, 2025Body and structure. Complaint Fuel door may require several attempts to open. Please note that if the complaint "Fuel filler flap not opening" occurs, it is important to check the fuel filler flap before replacing the central locking actuator. For gasoline hybrid vehicles where the fuel filler flap fails to open or does so but slowly, observe the document "Fuel filler flap fails to open or does so but slowly on plug-in HYBRID gasoline…
• 11013184Jan 24, 2025Body and structure. Complaint Noise from area of instrument panel Noise might occur in the following conditions: - At engine speeds of 1500 rpm to 2000 rpm. - In the speed range up to 45mph - Type of noise: "rattling" / "whirring" / "creaking" Cause Attachment points between strut on shock absorber tower and firewall. Remedy Proceed as described below: 1. Measure the current torque at the rear screws/bolts (strut to bulkhead) and…
• 11013179Jan 24, 2025Fuel system. Complaint Customer-perceived problem: • Fuel gauge reading implausible • MIL ON (market-dependent) N118/3 Fault codes in control units FSCM_GEN4/5/6 • For these fault codes, the tests contained in XENTRY must be carried out P046109 / P206609 / P13E600 • For these fault codes, the connector couplings/wiring harness routing must be checked for damage P206600 / P046100 Cause Various Remedy Carry out XENTRY tests for…
• 11013177Jan 24, 2025Engine. Complaint Check engine light on. Engine in limp-home mode. Rough running. Low fuel rail pressure fault code P008700 stored in MRG2 control unit. Additional faults below may be stored in MRG2 control unit: Misfire- P030000, P030100, P030200, P030300, P030400, P030084, P030004 Mixture adaptation- P217800 P218762, P017100, P017200, P217700 Injector malfunction- P02EE00, P02EF00, P02F000, P02F100, P214601, P214901…
• 11013077Jan 18, 2025Engine, Fuel system. Complaint Check engine light on. Engine in limp-home mode. Rough running. Low fuel rail pressure fault code P008700 stored in MRG2 control unit. Additional faults below may be stored in MRG2 control unit: Misfire- P030000, P030100, P030200, P030300, P030400, P030084, P030004 Mixture adaptation- P217800 P218762, P017100, P017200, P217700 Injector malfunction- P02EE00, P02EF00, P02F000, P02F100, P214601, P214901…
• 11013298Jan 16, 2025Transmission and drivetrain. Complaint Single throttle lift-off clunking noise from the side shaft when moving off (audible at the outboard end). The clunk is heard once when changing from forward to reverse (and vice versa). Cause If the complaint is eliminated by experimentally loosening the outboard collar nut (by 1 turn), the problem is due to micromovement in the connection between the wheel bearing inner race and the joint housing of the…
• 11013332Jan 15, 2025Transmission and drivetrain. Complaint Single throttle lift-off clunking noise from the side shaft when moving off (audible at the outboard end). The noise is heard once in each instance when changing direction of travel. Note: Sound file in attachment Cause If the complaint is eliminated by experimentally loosening the outboard collar nut (by 1 turn), the problem is due to cracking of the microweld between the wheel bearing inner race and the…
• 11013187Jan 15, 2025Electrical system. Complaint Station logos are no longer displayed in the radio after updating or SCN coding the A26/17 head unit. Cause Without active navigation (code 365), MBUX cannot assign and install the regional database of the station logos. Remedy There is no remedy available. The function is not supported and therefore considered normal operation.
• 11013086Jan 15, 2025Electrical system. Complaint The flap of the reversing camera opens and closes by itself during forward travel several times during the trip. No camera image is displayed in the head unit. The reversing camera or the 360° system functions normally when activated manually or by engaging drive range "R". Cause This is not a malfunction, but an intended system behavior. Calibration of the reversing camera is in progress.
• 11013189Jan 14, 2025Electrical system. Complaint When using the offroad display in the MBUX, the "Transparent hood" function cannot be activated using the camera symbol. Cause MBUX FUP5 software: • E504.3 (A 297 904 97 00) • E504.4 (A 297 904 03 01) Remedy Update of head unit A26/17 to the new software: FUP5 opt. E505.4 (A 297 904 05 01)
• 11012909Jan 14, 2025Electrical system. Complaint The remaining time shown on the instrument cluster in the workshop menu (days to next due service) is implausible (> < 365 days) for the following conditions: • for the date of the vehicle handover • or the last conducted and confirmed Service A/B Cause The following conditions can occur on vehicles with a disconnected on-board electrical system battery (12V/48V): • The period in which the on-board…
• 11012836Jan 10, 2025Electrical system. Mercedes-Benz AG, the manufacturer of Mercedes-Benz vehicles, has determined that on certain MY21-25 C-Class, CLA, EQB, AMG GT, EQE, EQS, G-CLASS, GLB, GLC, GLE, GLS, S-CLASS, AMG SL (206, 118, 243, 290, 192, 294, 295, 296, 297, 465, 247, 254, 167, 223, and 232 platform) vehicles, the MBUX multimedia system does not correspond with the latest series production configuration. The MBUX multimedia system control unit…
• 11013292Jan 9, 2025Engine. Complaint Engine idle fluctuates or stumbles at approximately 7 second interval. No relevant fault codes are stored. Cause Torque signal mismatch between MRG and PTCU control units. Only effects version 20B of PTCU. Remedy Software solution in development and LI will be updated once an ETA is available. Replacing parts will not resolve this symptom. Vehicle can be released to owner if there are no other symptoms…
• 11012789Jan 9, 2025Electrical system, Visibility (wipers, defrost, mirrors), Exterior lighting. Complaint Please note that the exact quick test conditions must be met as seen below. If not exactly as listed below, there is no need to create a TIPS case referencing this LI unless further assistance is needed outside of this document. Conditions Instrument Cluster Message: "Park Assist Inoperative" and B223263 with Bosch-ID C259; A+S (Active and Stored) and B223255 with Bosch-ID 1B5D; A+S (Active and Stored)…
• 11012808Jan 8, 2025Air bags. Complaint Electrical fault on rear airbag/window airbag. SRS indicator light on in instrument cluster. Cause Contact problems that may create a short circuit between the pins or to the vehicle ground Remedy Connect and disconnect the affected airbag five times Then the squib must be carefully blown out with dry compressed air. Important: There may be no mechanical contact! If fault is not rectified: Please measure…
• 11012802Jan 8, 2025Steering. Complaint Play noticeable in the height adjustment of the steering column. See arrow direction in attached pictures. Cause Slipped thrust bearing ring on the height adjustment. Remedy Install repair kit for height adjustment of the steering column. For tightening torque, see attachment.
• 11012782Jan 7, 2025Electrical system. Complaint For the potentially affected vehicles, excessively high aging of the battery was calculated at cold battery temperatures (<50°F) and the MIL activated accordingly, even though there is no corresponding high level of aging physically. In this regard, the fault code P0A7F00 "The age limit of the hybrid/high-voltage battery module has been reached" is displayed in the N127 PTCU control unit and/or A66…
• 11012806Jan 6, 2025Lane departure, Electrical system. Complaint Hand detection system not operating correctly / vehicles with code 266 Fault message in instrument cluster: "Active Emergency Stop Assist not available" "Active Lane Keeping Assist not available" Cause Possible causes: the hand detection mat, the hand detection control unit, the contacts and the steering wheel harness. Remedy Test Procedure: Perform an initial quick test with freeze frame data.
• 11012804Jan 3, 2025Exterior lighting. Complaint Message in instrument cluster "Adaptive high beams assistant not available/inoperative" or "DIGITAL LIGHT reduced range of functions" in relation to "FC151E29- The level sensor at front left has a malfunction. There is an invalid signal" in the HLI control unit. Cause HLI control units processing of level sensor data. Remedy Software fix under development. LI will be updated upon release. Parts…
• 11012787Jan 3, 2025Electrical system. Complaint The vehicle's position on the map is displayed far away from its actual position, e.g. the vehicle is displayed as being in the middle of the ocean. Note: In the quick test, no relevant DTC is displayed for this. Cause The GNSS antenna is not correctly inserted at the GNSS connection (see picture in the attachment) in the head unit (A26/17). Remedy Insert the connector into the GNSS connection and ensure…
• 11012060Dec 20, 2024Engine. Complaint Check engine light illuminated. Fault code P042000 Current or stored in MRG2 control unit. Cause Catalytic converter not operating efficiently Remedy Replace catalytic converter. Note: Additional hardware replacement is not needed unless other symptoms are present. If there are other faults relating to engine operation, diagnose these separately.
• 11012059Dec 20, 2024Electrical system, Engine. Complaint Engine warning light active. Fault code P012D12 The pressure sensor upstream of exhaust gas turbocharger has short circuit to positive. There is a short circuit to positive. is stored in the control unit N3/10 N3/10 - engine electronics 'MED41''M264'. Cause In the course of a pre-repair, the lines may be damaged due to the feed line to component part B28/11 pressure sensor downstream of air filter being…
• 11012055Dec 19, 2024Engine. Complaint Low engine oil level warning. Engine oil leak under vehicle. Cause Rear crankshaft radial seal rolled during installation Remedy -Check for external oil leak with visual inspection. -Remove inspection cover on left side of transmission and check for oil in bell housing. -If oil is found in bell housing, remove transmission and determine location of leak. Replace rear crankshaft sealing ring if found…
• 11011846Dec 11, 2024Electrical system. Complaint Customer states CEL is on. Cause Quick test shows FC P0A7F00 The state of health limit of the hybrid/high-voltage battery module has been reached. No drivability concerns occurred and vehicle drives as normal. Remedy Do not replace any parts!! 254: SW has been released. Ensure all Add-ons are installed. Update A66 with the latest SW A 000 903 51 75 MY24 206: SW has been released. Ensure all Add-ons are…
• 11010970Nov 27, 2024Electrical system. Mercedes-Benz AG, the manufacturer of Mercedes-Benz vehicles, has determined that on certain MY21-25 C-Class, CLA, EQB, EQE, EQS, G-Class, GLA, GLB, GLC, GLE, GLS, GT, S-Class, and SL (206, 118, 243, 294, 296, 465, 247, 254, 167, 192, 223, and 232 platform) vehicles, the MBUX multimedia system does not correspond with the latest series production configuration. The MBUX multimedia system control unit will receive…
• 11010907Nov 25, 2024Electrical system. Complaint The flap of the reversing camera opens and closes by itself during forward travel. This happens several times during the trip. The customer notices the sound of opening and closing. No camera image is displayed in the head unit. The reversing camera or the 360° system functions normally when activated manually or by engaging drive range "R". This behavior occurs again during each driving cycle.
• 11010818Nov 20, 2024Transmission and drivetrain. Complaint Transmission control unit Y3/8n4 (fully integrated transmission control unit (VGS)) not listed in quick test and/or no communication possible with VGS. Cause Transmission control unit Y3/8n4 Remedy It is important that LI54.15-P-057373 is processed before replacing any component parts (transmission 722.9).
• 11010755Nov 20, 2024Electrical system. Complaint After a control unit replacement of "N112/9 - control unit for telematics services (HERMES)" or the "N112/2 - control unit for telematics services (RAMSES)", the Digital Extras (previously Mercedes me) cannot be activated. The DTC B15CE00 is active or active+saved.
• 11010494Nov 13, 2024Exterior lighting, Visibility (wipers, defrost, mirrors). Complaint Rear lamps fogged up/not leaktight. Cause Fogging of the rear lamps is a natural phenomenon, which can occur under certain climatic conditions. This does not lead to any technical impairment of the rear lamps. Remedy Rear lamp: Remedy 1: Clearing fogged/condensed rear lamps: 1. Drive the vehicle into the workshop (temperature higher than +18 °C/+64.4 °F) Note: Do not wash the vehicle or subject it to…
• 11010455Nov 12, 2024Transmission and drivetrain. Complaint Only vehicles with a variable transfer case are affected. Can be identified through control unit N45 or N15/7 in the quick test When accelerating with light load, vibrations or jolting sensation may come from the drivetrain Cause Modified oil quality of the transfer case over time Remedy Check initial quick test for faults in the following control units N45 - All-wheel drive (ARS) N127 - 'Drivetrain'…
• 11010450Nov 12, 2024Electrical system. Complaint When using the offroad display in the MBUX, the "Transparent hood" function cannot be activated using the camera symbol. Cause MBUX FUP5 software: • E504.3 (A 297 904 97 00) • E504.4 (A 297 904 03 01) Remedy Update of head unit A26/17 to the new software: E504.5 (A 297 904 09 01)
• 11010435Nov 4, 2024Visibility (wipers, defrost, mirrors), Engine. Complaint -Check engine light(MIL) is ON. -Current and stored fault code in DCCU and PTCU : P2E9873 The position sensor of the exterior socket flap of the vehicle socket (direct current) has an electrical fault. The actuator does not open. -Starting the vehicle or Charging the vehicle is normal without any issues. Cause Software in the "N116/5 - Direct current charge connection unit (DCCU)" control unit. Remedy SW…
• 11010443Nov 2, 2024Engine. Complaint Check engine light on. Engine in limp-home mode. Rough running. Low fuel rail pressure fault code P008700 stored in MRG2 control unit. Additional faults below may be stored in MRG2 control unit: Misfire- P030000, P030100, P030200, P030300, P030400, P030084, P030004 Mixture adaptation- P217800 P218762, P017100, P017200, P217700 Injector malfunction- P02EE00, P02EF00, P02F000, P02F100, P214601, P214901…
• 11010188Nov 1, 2024Electrical system. Mercedes-Benz AG, the manufacturer of Mercedes-Benz vehicles, has determined that on certain MY24-25 C-Class, CLE, E-Class, GLC (206, 236, 214, 254 platform) vehicles, the infotainment system does not correspond with the latest series production configuration. The infotainment system control unit will receive an OTA software update. MBUSA will conduct an OTA service campaign.
• 11009552Nov 1, 2024Engine. Complaint Engine idle fluctuates or stumbles at approximately 5-10 second intervals. No relevant fault codes are stored. Cause Under analysis Remedy Do not replace parts or perform control unit software updates/adaptations. Create a TIPS case and submit to the powertrain team with the below information: -Video showing the tachometer or actual values from XENTRY diagnosis when symptom present -Quick test -N3/10 MRG2…
• 11009517Oct 25, 2024Engine. Complaint Engine is making abnormal noise at idle. May be described as rattle, tapping, or knocking. Cause Various Remedy If necessary compare the noise to a like vehicle and if determined to be abnormal proceed with below steps. Submit a TIPS case to the powertrain team with details from the below checks: Check engine maintenance history and oil level. Determine location where noise is most noticeable on engine…
• 11009125Oct 23, 2024Electrical system. Complaint During cold starting, a tortoise symbol may be displayed in the event of reduced engine output. (see attachment) For "non-hybrid vehicles", the thermostat symbol must be displayed. (see attachment) Cause SCN Coding of the N133/1 IC-Instrument-Cluster Remedy Perform N133/1 IC-Instrument-Cluster manual SCN coding.
• 11009122Oct 23, 2024Visibility (wipers, defrost, mirrors), Body and structure. Complaint Washer fluid system leaks Cause Various possible causes: 1. Washer fluid reservoir itself. 2. Seal on washer fluid pump/washer fluid reservoir. 3. Washer fluid pump. 3.1. Distributor housing leaks. 3.2. Pump fitting leaks. 3.3. Washer fluid hose cannot be snapped into place on pump fitting. 3.4. Washer fluid hose will not stay on pump fitting, although connector OK. 4. Washer fluid line. 4.1 Connector…
• 11009138Oct 22, 2024Electrical system, Exterior lighting. Complaint Message in instrument cluster "Adaptive high beams assistant not available/inoperative" or "DIGITAL LIGHT reduced range of functions" in relation to "FC151E29- The level sensor at front left has a malfunction. There is an invalid signal" in the HLI control unit. Cause Older software release, HLI control units Remedy Update of HLI control units (E1n9 / E2n9)
• 11009036Oct 16, 2024Electrical system, Wheels. Complaint "Active Emergency Stop Assist Currently Unavailable" and "Active Steering Assist Inoperative" instrument cluster messages along with Tire Pressure Light on in Instrument Cluster. Cause Both systems are temporarily unavailable due to low tire pressures. An active tire pressure monitor light may result in some assistance features being temporarily unavailable until tire pressures are corrected. Remedy…
• 11008977Oct 16, 2024Electrical system, Engine. Complaint Combustion engine could no longer be started, only electric driving possible. Cause High-voltage belt-driven starter-alternator faulty. Remedy Requirement: Prior to the implementation of the test work, it must be ensured that the person carrying out this work has successfully completed the required HV qualification to work on HV system.
• 11008885Oct 4, 2024Electrical system. Mercedes-Benz AG, the manufacturer of Mercedes-Benz vehicles, has determined that on certain MY 2023 2024 C-Class (206 platform) and GLC (254 platform) vehicles, the door control unit software does not correspond to current production specifications. In this case, the 12V starter battery may sporadically discharge. MBUSA will conduct a service campaign. An authorized Mercedes-Benz dealer will update the door…
• 11008883Oct 3, 2024Seats. Complaint Play/noise at height adjuster or in seat guide rail on front seats Cause Tolerances and variations in the manufacturing process Remedy Review of barcode adhesive label on air intake pipe of height adjuster. The seat frame base with the height adjuster motor can be replaced if the production status is lower than E105 (pic.1: seat label) If the production status is higher than or equal to E105, please…
• 11008880Oct 3, 2024Electrical system. Complaint After a control unit replacement of "N112/9 - control unit for telematics services (HERMES)" or the "N112/2 - control unit for telematics services (RAMSES)", the Digital Extras (previously Mercedes me) cannot be activated. The DTC B15CE00 is active or active+saved.
• 11008879Oct 3, 2024Electrical system. Complaint This document applies to vehicles of model series 206 and 254 from SOP (start of production) with NTG7, that do not have SA code 367: The Live Traffic Information Digital Extra is missing, is not available or does not work, even though the license has been purchased from the Mercedes me Store. Cause Problem with the store's offer provision for Digital Extras. Remedy Remedial action is currently being…
• 11008873Oct 1, 2024Transmission and drivetrain. Complaint Tension-releasing impact of the propeller shaft with the force-free in D "KID" function, after vehicle has stopped. Cause The tension-releasing jolt in the drivetrain originates as a result of the "release" of energy stored when braking through the force-free switch after stopping. It is suspected that the longitudinal bearing is being placed under tension here as a result of the vehicle "dropping off"…
• 11008091Sep 28, 2024Electrical system. Complaint During a phone call, the called party has difficulty understanding/cannot understand the driver, or interference/background noises are audible to the called party during a call. It becomes increasingly difficult to understand as the speed rises. Cause A. Seating of the microphones in the headliner. Side edges are covered by the textile cover (see picture "1") B. Assembly of microphones (B25/20 or B25/21)…
• 11008081Sep 27, 2024Body and structure, Electrical system. Mercedes-Benz AG, the manufacturer of Mercedes-Benz vehicles, has determined that on certain MY 2024 C-Class and E-Class (206 and 214 platform) vehicles, the electronic ignition lock control unit does not correspond to current specifications. As a result, the ignition lock may not react after a key cycle, which could result in the vehicle not starting and the instrument cluster display not reacting. MBUSA will…

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