2019 Mercedes-Benz CLS 450 Technical Service Bulletins

196 technical service bulletins (TSBs) are on record for the 2019 Mercedes-Benz CLS 450. 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.

• 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…
• 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…
• 10249726Jan 18, 2024Electrical system. Mercedes-Benz AG (“MBAG”), the manufacturer of Mercedes-Benz, has determined that in certain MY 2017-2021 C-Class, CLA, CLS, E-Class, GLC, GLE, GLS, AMG GT, S-Class, SL, and SLC (205, 117, 257, 213/238, 253, 166/292, 190/290,217/222, 231, 172) vehicles, the software of the communication module does not correspond with the latest series production configuration.
• 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.
• 10241790Aug 18, 2023Electrical system, Equipment. The Mercedes me connect services cannot be activated. The remote status data does not update. Error in N112/9 - control unit for telematics services (HERMES). In the HERMES control unit log, under the "URL" tab, the value DEFAULT is stored for "atpServerUrl" and/or "rcsServerUrl". Please carry out a re-commissioning of the control unit N112/9 - Control unit for telematics services (HERMES), which includes both a…
• 10238424Jun 9, 2023Equipment, Electrical system, Other or unknown. 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)
• 10233773Mar 23, 2023Engine cooling, Electrical system. Mercedes-Benz AG (“MBAG”), the manufacturer of Mercedes-Benz vehicles, has determined that the affected vehicles may not meet current On Board Diagnostics (“OBD”) emissions specifications. Under certain conditions, the permanent OBD fault code memory of the 48V ISG control unit may not activate. What We’re Doing MBUSA will conduct a voluntary Emission Recall Campaign in which an authorized Mercedes- Benz…
• 10233783Mar 1, 2023Steering. Complaint Loads induced at the steering wheel through pushing and pulling actions may cause creaking and cracking noises in the mechanical steering column. Cause Insufficient grease lubrication in the clamping area of the mechanical steering column. Remedy Grease the clamping area.
• 10232332Feb 21, 2023Latches, locks and linkages, Body and structure. Complaint The trunk lid is not latching into the closed position with the help of the trunk lid power closing function after the electric closing process. There is a loud rattling from the trunk or from the trunk lid power closing unit (M14/31). Cause Under Analysis Remedy Please create a TIPS case before attempting repair on the vehicle • Within case attach a video showing the concern • Attach CUL for N121
• 10231032Jan 5, 2023Latches, locks and linkages, Electrical system. 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.
• 10225816Oct 27, 2022Electrical system. Complaint This LI does Not apply to 223 or 206 which use a different generation of 48V systems. Please follow the relevant guided tests for the 223 and 206. For 223 with fault code B1FCB97 follow LI54.10-P-073164. Various causes are possible. The faults listed in the various causes do not all have to be present at all times. Some of these complaints may overlap. Rely on the faults listed in the Cause section for…
• 10222461Sep 12, 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. Remedy There are 2 repair procedures to follow depending on vehicle (differentiated according to model and vehicle manufacturing date) 1. Replace repair kit for steering column height adjustment 2…
• 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…
• 10222468Sep 6, 2022Transmission and drivetrain. Complaint This LI does Not apply to 223 or 206 which use a different generation of 48V systems. Please follow the relevant guided tests for the 223 and 206. For 223 with fault code B1FCB97 follow LI54.10-P-073164. Various causes are possible. The faults listed in the various causes do not all have to be present at all times. Some of these complaints may overlap. Rely on the faults listed in the Cause section for…
• 10217157Jul 14, 2022Electrical system, Equipment, Steering. 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. 1. Steering column height adjustment transmission 2. Seat control unit software Remedy There are 2 repair procedures to follow depending on vehicle (differentiated according to model and vehicle…
• 10217163Jul 8, 2022Equipment, Electrical system. 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.
• 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…
• 10208745Feb 24, 2022Electrical system. Complaint The following complaints may be noted by the customer: • Upon selecting navigation, the central display may show the following message: "Map data does not match with your system. Please insert a medium containing the corresponding map data".
• 10208744Feb 16, 2022Interior lighting. Complaint The touchpad dimming function does not work and the search lighting is either at maximum brightness or fully off (dependent upon dimming signal). Note: The dimming functions of the instrument cluster and head unit display are not affected and remain fully functional. Cause Touchpad (A105) hardware Remedy The serial numbers of the potentially affected parts can be found in the attached list.
• 10207198Jan 27, 2022Electrical system. Complaint The garage door hand transmitter cannot be initialized with the integrated garage door opener in the inside rearview mirror. Cause 1. The integrated garage door opener (GDO) is not compatible with the opening system installed in the garage. 2. The garage door drive uses a rolling code system. In contrast to the fixed code system, the LED in the mirror in this case flashes green after programming. 3.
• 10207199Jan 9, 2022Electrical system. Complaint The range of the integrated garage door opener (GTO) is too short. Cause 1. Vehicles equipped with infrared windows and/or a heated windshield may suffer from complaints involving low transmission power. 2. When comparing the range between the integrated GTO and the garage door hand transmitter, the garage door hand transmitter is tested outside the vehicle. 3. The garage door hand transmitter is being…
• 10207209Jan 4, 2022Equipment, Fuel system. Mercedes-Benz AG (“MBAG”), the manufacturer of Mercedes-Benz vehicles, has determined that on certain Model Year (“MY”) 2019 AMG E-Class (213 platform), AMG E-Class Coupe/Convertible (238 platform), AMG CLS-Class (257 platform) and CLS-Class (257 platform) vehicles, the Emission Control Information label does not correspond with valid vehicle specifications. As a result, customers may encounter issues…
• 10207183Jan 4, 2022Equipment, Engine cooling. Complaint Sporadic warning message in instrument cluster "Engine oil pressure stop switch off vehicle" (or similar) is shown in red on vehicles with low mileage. Cause Directional control valve may stick. Remedy 1- Read off oil level in instrument cluster and correct if necessary. 2- Perform approx. 10-15 engine starts, then clear fault codes. 3- Perform road test with vehicle. If fault code reoccurs during road…
• 10206080Dec 17, 2021Engine cooling. The exhaust gas cleaning information label does not correspond to currently valid specifications. It is therefore possible that the emission classification given on the information label may not correspond to the certified classification. This issue has no impact on the vehicle's registration papers.
• 10206077Dec 8, 2021Engine cooling. "MY15+ M278 and M157 Equipped Vehicles with Fault Code ""P023400 – Boost Pressure is Too High"" "
• 10206067Dec 2, 2021Equipment, Electrical system. MBUX multimedia system: Map data does not match with your system/the navigation system cannot be activated
• 10206063Dec 1, 2021Electrical system. "Functional impairment of 48 V on-board electrical system "
• 10205812Aug 27, 2021Equipment. The customer may note that the Dashcam feature is inoperable with one of the following complaints.
• 10205803Aug 27, 2021Equipment. The mobile phone address book may not be transferred completely to the multimedia system COMAND, Audio 20, or MBUX. The contact list may not be fully populated and in some instances, the call list will display telephone numbers but no names.
• 10205785Aug 25, 2021Transmission and drivetrain. If TRANSMISSION 725.1 9G TRONIC FACELIFT exhibits any "shift quality" concerns, vared diagnosis procedures are available to you for selected vehicle model series with STAR3 architecture,
• 10205813Aug 24, 2021Electrical system. On vehicles with code 077 HERMES dummy module the following functions are restricted, unavailable.
• 10205801Aug 10, 2021Equipment. Intermittently after bus sleep the lower control panel LCP and upper control panel UCP may be panel UCP may be inoperable.
• 10205811Aug 9, 2021Equipment. The customer may note that the Dashcam feature is inoperable with one of the following complaints.
• 10205810Aug 3, 2021Equipment. The customer may note that the Dashcam feature is inoperable with one of the following complaints.
• 10205809Aug 2, 2021Equipment. The customer may note that the Dashcam feature is inoperable with one of the following complaints:
• 10199654Jul 6, 2021Equipment. "Free browsing, Internet access via Wi-Fi hotspot and Internet radio nonfunctional"
• 10202531Jun 16, 2021Interior lighting. Touch pad: Search lighting does not dim or does not turn on.
• 10189407Feb 24, 2021Equipment, Electrical system. In XENTRY diagnosis, the message "MBUX multimedia system control unit is defective (hard drive, internal fault)" appears while attempting to communicate with the MBUX multimedia system (A26/17)
• 10189404Feb 19, 2021Electrical system. Complaint: Various causes are possible. The faults listed in the various causes do not all have to be present at all times. Some of these complaints may overlap. Rely on the faults listed in the Cause section for identifying the correct Remedy. 1. No start 2. Yellow or red instrument cluster message for 48 V on-board electrical system battery (G1/3) 3.
• 10189400Feb 11, 2021Engine cooling. Mercedes-Benz AG (?MBAG?), the manufacturer of Mercedes-Benz vehicles, has determined that on certain Model Year 2018-2019 C and E-Class vehicles (205/238 platforms), an incorrect activated carbon filter might have been installed. In this case, the vehicle may not meet emission and certification requirements. MBUSA will conduct a voluntary Emission Recall Campaign in which an authorized Mercedes- Benz dealer will…
• 10189411Feb 5, 2021Back-over prevention (rear camera). Update IDC Control Unit Software
• 10187785Jan 4, 2021Other or unknown, Electrical system, Equipment. The following complaints may be noted by the customer: - The MBUX multimedia system (A26/17) starts route guidance without user input and does not provide any audio notification. - The MBUX multimedia system (A26/17) does not give any spoken or visual driving instructions. Only the destination information and the current route are shown in the MBUX multimedia system (A26/17)
• 10186148Dec 30, 2020Visibility (wipers, defrost, mirrors). Air Conditioning Intermittently Does Not Cool
• 10186154Dec 11, 2020Electrical system. Mercedes-Benz AG (?MBAG?), the manufacturer of Mercedes-Benz, has determined that on certain Model Year (?MY?) 2019-2020 CLS-Class, E-Class, and GLE-Class (167, 213, 238, and 257 Platform) vehicles, the software for the on-board electrical system battery control unit does not correspond to the current series production configuration.
• 10186135Dec 9, 2020Brakes, Electronic stability control. If the customer brakes sharply from a speed of > 30mph, without ABS intervention, there is a single cracking noise from the area of the ESP hydraulic unit

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