2021 Mercedes-Benz GLB 250 Technical Service Bulletins

225 technical service bulletins (TSBs) are on record for the 2021 Mercedes-Benz GLB 250. 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.

• 11005294Jul 23, 2024Exterior lighting. 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…
• 11005313Jul 17, 2024Engine. Complaint Check engine light on and fault code P019185 current or stored in MED41 control unit. Adaptation and misfire faults may also be stored. Vehicle may enter limp home mode. Cause False detection of rail pressure sensor out of range. Remedy Update software of engine control module N3/10. Reset mixture adaptation and clear fault codes.
• 11005334Jul 15, 2024Brakes, Electrical system, Forward collision avoidance. 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.
• 11005288Jul 10, 2024Transmission and drivetrain. Complaint Instrument cluster message "4MATIC inoperative". The following fault code may be present in all-wheel drive control unit N15/17: P147354 - Erroneous adaptation of the transfer case. The calibration is missing. P14759A - The coupling of the transfer case has malfunctioned. The operating conditions for the component or the system have not been fulfilled. Cause Coupling of the rear axle differential has…
• 11003208Jun 6, 2024Visibility (wipers, defrost, mirrors). Complaint Noise can be heard coming from the air conditioning system at higher blower motor speeds. Cause Leaves/foreign objects have entered through the water drain grille in the water drain thereby causing an imbalance and noise in the blower wheel.
• 11000596May 7, 2024Transmission and drivetrain. Instrument cluster message "4MATIC inoperative". The following fault code may be present in all-wheel drive control unit N15/17: P147354 - Erroneous adaptation of the transfer case. The calibration is missing. P14759A - The coupling of the transfer case has malfunctioned. The operating conditions for the component or the system have not been fulfilled. Coupling of the rear axle differential has reached the wear…
• 11000541May 4, 2024Electrical system. Mercedes-Benz AG, the manufacturer of Mercedes-Benz vehicles, has determined that on certain MY21-24 C-Class, CLA, EQB, EQE, EQS, GLA, GLB, GLC, GLE, GLS, GT, S-Class, and SL (118, 167, 192, 206, 223, 232, 243, 247, 254, 290, 294, 295, 296 and 297 platform) vehicles, the MBUX system software does not correspond with the latest series production configuration.
• 10253708Apr 30, 2024Electrical system. In our continuing efforts to assure the proper performance of Mercedes-Benz products and to enhance the satisfaction of our customers, Mercedes-Benz USA (MBUSA) is extending the coverage for the Fuel System Control Module (FSCM) software on your vehicle from the original New Vehicle Limited Warranty of 4 years / 50,000 miles to 1 S year: / 150,000 mile: (whichever occurs: first), and applies to the vehicle…
• 10253703Apr 26, 2024Electrical system. This is to notify you of the Service Campaign OTA update for the MBUX system software in 750,313 Model Year (MY) MY19-24 A-Class, CLA, CLS, E-Class, EQB, GLA, GLB, GLC, GLE, GLS, GT 4-door (177, 118, 257, 213, 238, 243, 247, 253,167, 290 platform) vehicles. The vehicles will not be visible or flagged in VMI or EVA.
• 10253715Apr 23, 2024Fuel system, Electrical system, Engine cooling. Check engine light active and FC P146364 Temp. and pressure sensor B4/7 is stored in Engine control unit and Fuel pump control unit. Software parameter in Fuel pump control unit. Perform software update for Fuel System Control Module (FSCM) N118. New software is A0009026661.
• 10253706Apr 12, 2024Electrical system, Fuel system. IMPORTANT EMISSION EXTENDED WARRANTY INFORMATION In our continuing efforts to assure the proper performance of Mercedes-Benz products and to enhance the satisfaction of our customers, Mercedes-Benz USA, LLC ("MBUSA") is extending the warranty coverage on the Fuel System Control Module (FSCM) software in certain Model Year ("MY") vehicles listed below from the original New Vehicle Limited Warranty of 4 years/50,000…
• 10252777Mar 11, 2024Electrical system, Body and structure. Tailgate opens unintentionally. Accidental or unnoticed activation of the button to open the tailgate on the vehicle key. E.g. when stored in trouser pocket, handbag etc. Remedy As of the 6th generation, the vehicle key can be recoded so that the tailgate no longer opens as a result of a long press on the button, but by double-clicking on the button instead. The recoding can be carried out as follows: 1. Add AO…
• 10251356Feb 23, 2024Electrical system, Equipment. The radio station favorites list is no longer present after bus idle Saving process during download Perform software update in control unit HU6 in the head unit (A26/17) to version E871.1 (A 247 904 53 00).
• 10251118Feb 15, 2024Electrical system. After clicking on the "Radio" selection function, the radio does not start and instead a permanent loading wheel is displayed. See attached picture for example. Software version Remedy A26/17 - MBUX multimedia system (Head unit) unit must be replaced. When the head unit is in this condition, a software update will not remedy the situation.
• 10251176Feb 9, 2024Electrical system. Mercedes-Benz AG (“MBAG”), the manufacturer of Mercedes-Benz vehicles, has determined that on certain MY20-23 A-Class, C-Class, CLA, CLS, E-Class, GLA, GLB, GLC, GLE, GLS, AMG GT, S-Class (177, 205, 118, 257, 213, 238, 247, 253, 167, 290, 217, 222 platform) vehicles, the communication module system software does not correspond with the latest series production configuration.
• 10249540Jan 29, 2024Electrical system. Mercedes-Benz AG (“MBAG”), the manufacturer of Mercedes-Benz vehicles, has determined that on certain MY 2019-2023 A-Class, CLA, E-Class, G-Class, GLA, GLB, GLC, GLE, GLS, and S-Class (177, 118, 238, 463, 247, 253, 167, and 222 platform) vehicles, the communication module system software does not correspond with the latest series production configuration. The communication module system will receive an…
• 10249495Jan 24, 2024Steering. Noises in the steering column area when steering. Under analysis. Check which area of the steering column the noises occur in. Do the noises tend to occur at the bottom in the driver footwell or do they tend to occur in the area of the steering column switch module (MRSM/SCCM)? If the noises occur in the area of the MRSM/SCCM, work through the following points: - Loosen screws of the MRSM/SCCM and steering wheel…
• 10249482Jan 24, 2024Steering. The steering wheel generates grinding noises between the steering wheel and steering column switch module during steering maneuvers See example file in the attachments area: Lenkrad-Schleifgeräusch_SteeringWheel-GrindingNoises.mp4 The plastic cover on the back of the steering wheel is not positioned correctly and may therefore rub against the steering column switch module Please use the following noise files for…
• 10249731Jan 18, 2024Body and structure. Mercedes-Benz AG (MBAG), the manufacturer of Mercedes-Benz vehicles, has determined that on certain MY 2020-2021 GLA and GLB (247 platform) vehicles, the identification plate on the B-pillar does not correspond to current specifications.MBUSA will conduct a service campaign. An authorized Mercedes-Benz dealer will replace the identification plate on the B-pillar.
• 10249537Jan 12, 2024Electrical system. Complaint Customer complains about anti-theft alarm system triggering without obvious cause when the vehicle is parked and/or when entering the vehicle. All MFA2 and 167 derivates with code 882 may be affected. This is caused by a sporadic loss of communication to the anti-theft alarm system [N26/6]. In many instances there are one or more FCs U110D87, U001988, U016787 stored in the control units anti-theft alarm…
• 10249740Jan 5, 2024Electrical system. Dear Mercedes-Benz Owner: On behalf of Mercedes-Benz USA, LLC (MBUSA), thank you for being a part of the Mercedes-Benz family. We hope that you’re enjoying your vehicle. Here at MBUSA, we are committed to delivering an exceptional ownership experience.
• 10248195Dec 7, 2023Electrical system. Mercedes-Benz AG (“MBAG”), the manufacturer of Mercedes-Benz vehicles, has determined that on certain MY19-23 A-Class, C-Class, CLA, CLS, E-Class, EQB, G-Class, GLA, GLB, GLC, GLE, GLS, AMG GT, S-Class (177, 205, 118, 257, 213, 238, 243, 463, 247, 253, 167, 290, 217, 222 platform) vehicles, the communication module system software does not correspond with the latest series production configuration.
• 10248162Dec 4, 2023Seats. Crease formation on genuine leather seat covers in vehicles with low mileage • Objects left on the seats for extended periods of time (pressure marks). • Objects wedged between the seat backrest and seat cushion (e.g. seat belt buckle). • Light initial creases due to vehicle handling. • Light creases in the outer covers originating from the production process (missing finish). Heat treatment of…
• 10248203Dec 1, 2023Electrical system. Mercedes-Benz AG, the manufacturer of Mercedes-Benz vehicles, has determined that on certain MY19-23 A-Class, CLA, CLS, E-Class, EQB, GLA, GLB, GLC, GLE, GLS, AMG GT (177, 118, 257, 213, 238, 243, 247, 253,167, 290 platform) vehicles, the head unit software does not correspond to the current series production configuration. The head unit will receive an OTA update to optimize the "Live Traffic Information" service…
• 10244837Oct 10, 2023Electrical system. The "SOS nonfunctional" message appears sporadically in the instrument cluster of the vehicle. The fault code B129C00 is stored in the control unit log. The message occurs in particular after the vehicle has been non-operational for an extended period of time; the message then disappears of its own accord after a few minutes. No functional limitation to the emergency call system is to be expected. Software error in…
• 10241527Aug 28, 2023Electrical system. Mercedes-Benz AG (“MBAG”), the manufacturer of Mercedes-Benz vehicles, has determined that on certain MY 2018-2023 C-Class, EQE, EQE SUV, EQS, EQS SUV, GLC, GLE and S-Class (206, 295, 294, 297, 296, 254, 167 and 223 platform) vehicles, the communication module software does not correspond with the latest series production configuration. The update is free of charge and will be carried out in the background.
• 10241534Aug 3, 2023Engine cooling. In our continuing efforts to assure the proper performance of Mercedes-Benz products and to enhance the satisfaction of our customers, Mercedes-Benz USA, LLC (“MBUSA”) is extending the warranty coverage on the exhaust valve system in certain Model Year (“MY”) vehicles listed below from the original New Vehicle Limited Warranty of 4 years/50,000 miles to 15 years/150,000 miles (whichever occurs first).
• 10238424Jun 9, 2023Other or unknown, Electrical system, Equipment. In the MBUX weather app, the temperature is displayed in the wrong unit (Fahrenheit instead of °C, or vice versa). Temperature setting in Mmc mobile application settings incorrect Remedy Adjust the setting in the Mercedes me connect app via mobile phone (settings -> units)
• 10235667Apr 4, 2023Electrical system. Complaint Ambient lighting malfunctions sporadically, mainly in the Ocean Blue color value and with animation "ON". After the next ignition cycle, the ambient lighting functions again correctly. Cause Software in coupling elements (EKE) faulty. The coupling element software cannot be updated in After-Sales. Remedy In a complaint case, replace the respective wiring harness (coupling elements are installed on the…
• 10233789Mar 8, 2023Body and structure, Visibility (wipers, defrost, mirrors). Complaint Excessive resistance of door side windows when being raised/lowered, cracking and squeaking noises. Cause Sealing lip of inner sealing rail (see picture 1 and picture 2, pos. 40 and 130) folds down while side windows are being lowered (opened). When the side windows are raised (closed), the sealing lip is pulled back up again. Remedy Replace inner sealing rail. Then perform normalization of the window…
• 10233782Mar 2, 2023Brakes. Complaint Squeaking noises from the front axle brakes when operating the brakes. The noise occurs regardless of the temperature. Cause The noise occurs due to friction between the lining and the brake caliper. Remedy • Removal of brake linings • Cleaning all contact points on brake lining and brake caliper/carrier • Greasing contact points (green areas) between brake lining and guide of brake caliper with…
• 10232320Feb 10, 2023Electrical system. Mercedes-Benz AG (“MBAG”), the manufacturer of Mercedes-Benz, has produced certain MY 2021-2022 A-Class, CLA-Class, CLS-Class, E-Class, GLA-Class, GLB-Class, GLC-Class, GLEClass, GLS-Class, and AMG GT (177, 118, 257, 213, 247, 253, 167 and 290 platform) vehicles without the augmented reality camera (“ARC”), as disclosed at the time of sale to the vehicle purchaser. As a result, the ARC and "Dash-cam"…
• 10231032Jan 5, 2023Electrical system, Latches, locks and linkages. Complaint Tailgate opens unintentionally. Cause Accidental or unnoticed activation of the button to open the tailgate on the vehicle key. E.g. when stored in trouser pocket, handbag etc. Remedy As of the 6th generation, the vehicle key can be recoded so that the tailgate no longer opens as a result of a long press on the button, but by double-clicking on the button instead.
• 10231040Jan 4, 2023Visibility (wipers, defrost, mirrors). Complaint Noise can be heard coming from the air conditioning system at higher blower motor speeds. Cause Leaves/foreign objects have entered through the water drain grille in the water drain thereby causing an imbalance and noise in the blower wheel. Remedy Remove any debris and replace the listed components.
• 10228824Dec 9, 2022Transmission and drivetrain. Mercedes-Benz AG (“MBAG”), the manufacturer of Mercedes-Benz vehicles, has determined that on certain MY 2020-2021 GLA-Class and GLB-Class (156/247 platform) vehicles, the transmission bearing cap cover does not correspond to current specifications. Over time, the transmission bearing cover may loosen, which may result in minor oil loss. An instrument cluster transmission light will still alert the user if it…
• 10228813Dec 5, 2022Body and structure. Complaint Staining on door trim strips and top and bottom trim elements on rear side windows. See example pictures 1, 2 and 3. Cause Damage to protective coating of door beltline trim strips, door upper trim strips and side window trim element. Remedy 1. Check if the problem cannot be rectified by polishing the trim bars with the polishing paste. 2.
• 10228807Dec 1, 2022Steering. Complaint Height adjustment of electric steering column adjustment jammed in the top/bottom adjustment position (e.g. with Easy Entry function). Cause Height adjustment moves to the top/bottom limit stop and jams.
• 10227143Nov 1, 2022Steering. Complaint Squeaking noise from area of input shaft of electric steering Cause Inadequate lubrication. Remedy Grease/lubricate sealing area of input shaft. • The steering components can be greased/lubricated while they are still installed
• 10222481Sep 8, 2022Electrical system. Complaint Customer states after a bus sleep the SiriusXM category changes from "My Favorites" to "All Stations" or a different category. Sometimes, the "My Favorites" category will be unavailable for the entire drive cycle. Cause Current MBUX Multimedia System (A26/17) software release Remedy Software update of MBUX Multimedia System (A26/17) to E905.4 (in development). This document will be…
• 10222464Sep 2, 2022Steering. Complaint Vibrations in steering at speeds lower than 30 mph. Possible when turning and also partly noticeable after changing to winter or all-season tires. Cause Controller stability of steering software, caused by reduced friction in steering (tolerance for production + running-in characteristics). Remedy Software update available in 1st quarter of 2023 (adaptation of stability limits)
• 10219265Aug 2, 2022Steering. Complaint Vibrations in steering at speeds lower than 30 mph. Possible when turning and also partly noticeable after changing to winter or all-season tires. Cause Controller stability of steering software, caused by reduced friction in steering (tolerance for production + running-in characteristics). Remedy Software update available in 1st quarter of 2023 (adaptation of stability limits)
• 10217159Jul 20, 2022Engine cooling, Equipment, Electrical system. Complaint - Vehicle cannot be unlocked/ vehicle does not start - Display message in instrument cluster "Battery - Start Engine - see Operator's Manual Cause Root cause is a bus keepawake in either the Headlight control unit or in one of the following: ALC, IC, SAM, PTCU, ESP. Additionally, the quick test will show U116000 "A bus keepawake control unit has been detected" in the electronic ignition switch…
• 10217158Jul 11, 2022Equipment, Steering. Complaint Noises from the area of the steering column. - Creaking - Squeaking - Chattering - Humming - Grinding Cause At present, there are no known noise problems with the steering column. Remedy Check surrounding area of the steering column for possible noises. - Instrument panel support - Steering column switch module If the cause of the noise can be narrowed down to the steering column, create a PTSS case
• 10217163Jul 8, 2022Electrical system, Equipment. Complaint The Apple Carplay interface cannot be controlled via the center console touchpad or the right-hand steering wheel touchpad. Cause A setting on the iPhone may prevent control via the touchpad Remedy To remedy on the affected iPhone, navigate to "Settings" -> "Accessibility" -> "Touch" and turn the "BackTap" option OFF.
• 10215016Jun 30, 2022Electrical system. Mercedes-Benz AG (“MBAG”), the manufacturer of Mercedes-Benz vehicles, has determined that on certain Model Year (“MY”) 2020-2022 A-Class, C-Class, CLAClass, GLA-Class, GLB-Class, GLC-Class, GLE-Class, and GLS-Class (118, 167, 177, 205, 247, and 253 platform) vehicles, the mobile phone cradle control unit software does not correspond to the current series production specifications. It is therefore possible…
• 10213049May 9, 2022Steering. Complaint Squeaking noise from area of input shaft of electric steering Cause Inadequate lubrication. Remedy Grease/lubricate sealing area of input shaft.
• 10210919Apr 27, 2022Electrical system. Mercedes-Benz AG (“MBAG”), the manufacturer of Mercedes-Benz, has determined that certain MY 2021-2022 CLA-Class, A-Class, CLS-Class, E-Class, GLA-Class, GLB-Class, GLC-Class (118, 177, 213, 238, 247, 253, and 257 platform) vehicles were manufactured without the HERMES control unit, as disclosed to the vehicle purchaser at the time of sale. As a result, the Mercedes Me Connect services including the emergency…
• 10210929Apr 14, 2022Electrical system. Complaint Volume and bass level too low Cause Current sound amp (N40/3) software release. Important: • On vehicles with standard sound, the rear subwoofer (H21/35) emits the engine sound only (if equipped with M139 engine) • On vehicles with code 853 (Advanced Sound) or 810 (Premium Sound), the rear subwoofer (H21/35) emits not only the engine sound, but also entertainment sound Remedy Perform a software update…
• 10210926Apr 1, 2022Electrical system, Wheels. Complaint Fault message (yellow) in instrument cluster and TPM warning lamp. Individual or all tire pressure sensors are not recognized. Tire pressure monitoring system nonfunctional / temporarily unavailable. Cause Tires with excessively-large radio signal attenuation interfere with transmission of the tire pressure sensors. Remedy Check if one of the following tires is installed: If one of the tires listed above…
• 10209877Mar 31, 2022Electrical system. Complaint The result from the XENTRY battery test does not match the current state of the battery. Cause The XENTRY battery tester uses the stored on-board electrical system data in the SAM module to access the health of the 12 volt battery. The XENTRY battery test may not take into account a single discharge event because the SAM cannot record the data if the battery is discharged. Note: A discharged battery does…

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