2020 Mercedes-Benz CLA250 Technical Service Bulletins

286 technical service bulletins (TSBs) are on record for the 2020 Mercedes-Benz CLA250. 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.

• 10206067Dec 2, 2021Equipment, Electrical system. MBUX multimedia system: Map data does not match with your system/the navigation system cannot be activated
• 10205841Sep 24, 2021Other or unknown, Wheels. Spare wheel.
• 10205806Aug 30, 2021Equipment. 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". the navigation menu cannot be opened.
• 10205812Aug 27, 2021Equipment. The customer may note that the Dashcam feature is inoperable with one of the following complaints.
• 10205813Aug 24, 2021Electrical system. On vehicles with code 077 HERMES dummy module the following functions are restricted, unavailable.
• 10205821Aug 13, 2021Engine cooling, Other or unknown. Important new emission service campaign information.
• 10205814Aug 11, 2021Fuel system. Fuel filler flap opens slowly/switch flashes/tank is bleeding instrument cluster warning
• 10205811Aug 9, 2021Equipment. The customer may note that the Dashcam feature is inoperable with one of the following complaints.
• 10205804Aug 9, 2021Equipment. Insufficient charging or no wireless charging with iPhone 12.
• 10205786Aug 5, 2021Transmission and drivetrain. Transmission does not shift into reverse.
• 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:
• 10205789Jul 26, 2021Tires. Front right tire pressure sensor sporadically or permanently not detected.
• 10199660Jul 8, 2021Engine cooling, Visibility (wipers, defrost, mirrors), Equipment. Coolant warning in instrument cluster - Leak in coolant line
• 10199654Jul 6, 2021Equipment. "Free browsing, Internet access via Wi-Fi hotspot and Internet radio nonfunctional"
• 10199449Jul 2, 2021Equipment. Launch NCU - 2021030010 MY20-21 Various Add Supplementary Booklet to Printed Operators Manual
• 10191289Mar 29, 2021Equipment. Message (yellow) in IC "Active Brake Assist currently restricted, see operator's manual, Remedy: Deactivate transport mode and drive vehicle for approx 6mi. The DTC then switches to passive and the sensor can be calibrated
• 10191256Mar 26, 2021Engine cooling. Mercedes-Benz AG (?MBAG?), the manufacturer of Mercedes-Benz vehicles, has determined that on certain MY 2020 C-Class (205) and GLE-Class (167) vehicles, the mixing ratio of coolant to antifreeze may not meet production specifications.
• 10191271Mar 24, 2021Electrical system. Engine switches off again when re-attempting Remote Start via Mercedes me App. This only occurs if the first Remote Start via the Mercedes me App was canceled and then started again. If the first attempt was stopped by unlocking the doors or if the engine ran for more than 10 minutes, then the second attempt is also successful
• 10191272Mar 19, 2021Steering. Steering wheel heater and/or Distronic cannot be activated. Remedy: Update software for steering wheel electronics control unit ("N 135 - Steering wheel electronics (LRE)"). Should the quick test carried out after the software update still show DTCs with the steering wheel heater and/or Distronic, replace the steering wheel control panels
• 10191281Mar 12, 2021Suspension. Humming noises or vibrations from the area of the rear axle when maneuvering or moving off at traffic lights/intersections.
• 10191276Mar 10, 2021Steering. Noise from the front axle when steering while stationary or when steering at low speeds
• 10189406Feb 22, 2021Back-over prevention (rear camera). If the exhaust flap is operated or the drive program is changed within 10 seconds of the engine being started, an audible humming noise may emit from the speakers. New sound amp (N40/3) software is currently in development. This document will be updated once it is released. Meanwhile, avoid toggling the drive program or the exhaust flap with 10 seconds of an engine start to avoid the possibility of the complaint…
• 10186147Dec 30, 2020Visibility (wipers, defrost, mirrors). Air Conditioning System Occasionally Does Not Cool Correctly At Outside Temperatures Above 40°C
• 10186139Dec 1, 2020Engine, Fuel system. Check engine light on and FC P146264 sto- red in engine and fuel pump control units
• 10186134Nov 12, 2020Transmission and drivetrain. Communication errors with control unit AWD_M- FA2 - N15/17 - All-wheel drive (transfer case)
• 10186133Nov 12, 2020Electrical system. Fault code for short circuit to ground stored in AW- D_MFA2 - N15/17 - all-wheel drive (transfer case)
• 10179976Aug 28, 2020Brakes. Mercedes-Benz AG ("MBAG"), the manufacturer of Mercedes-Benz vehicles, has determined that certain MY 2019-2021 A-Class (177 platform), CLA-Class (118 platform), GLA-Class (247 platform), and GLB-Class (247 platform) vehicles might not be equipped with a means to check the wear status of the brake pads on the rear axle. Furthermore, information regarding the brake gauge and its operation might not be included in…
• 10179904Aug 28, 2020Electrical system. Implausible "service due" instrument cluster message, head unit pop-up, or Mmc message
• 10179961Aug 10, 2020Equipment. Mobile phone Apple iPhone 11/11Pro/11ProMax/SE 2020: The Bluetooth connection between the MBUX multimedia system and the mobile phone is briefly lost
• 10179956Aug 10, 2020Electrical system. Xentry Battery Tester results disagree with workshop assessment
• 10179907Aug 3, 2020Lane departure. Engine diagnosis warning lamp activated - Fault code P012800
• 10179966Jul 31, 2020Equipment, Other or unknown. Incorrect time and/or instrument cluster message "SOS, service not activated" and/or Mercedes Me connect services nonfunctional
• 10178737Jul 23, 2020Electrical system. MBUX multimedia system: "Favorites" and "Recent destinations" not available
• 10178736Jul 23, 2020Visibility (wipers, defrost, mirrors). Rollerblind or panoramic roof do not actuate as expected
• 10178732Jul 20, 2020Equipment. Air Conditioning Intermittently Does Not Cool
• 10178744Jul 17, 2020Equipment. The operator's manual for the above vehicles does not comply with current specifications. "Daimler AG" may be documented as the manufacturer in the operator's manual. The new manufacturer is "Mercedes-Benz AG." We thus ask that you place the supplementary booklet into the vehicle. The work required for this purpose can be found in the attached work description.
• 10178712Jul 2, 2020Fuel system, Other or unknown. Message in the Instrument Cluster "Refill 1L Oil at the Next Fuel Stop"
• 10178711Jul 1, 2020Electrical system, Fuel system, Other or unknown. Message in the Instrument Cluster "Refill 1L Oil at the Next Fuel Stop"
• 10178715Jun 30, 2020Exterior lighting. Headlamps fogged
• 10177571Jun 30, 2020Exterior lighting, Equipment. Lamp unit fogged or droplets forming. Due to the vent openings, the lamp unit is an "open system". This means that acidic gases, moisture, dirt and exhaust gases can penetrate it. This can result in deposits on the diffuser and lens. Check housing cover of lamp unit for natural fogging or dew as per GI82.10-P-009047. . 1. If a reduction in the degree of fogging is visible, the desiccant packs can be used once the…
• 10177569Jun 30, 2020Equipment, 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). Internal hard drive defect. Replacement of internal hard drive. The MBUX multimedia system (A26/17) hard drive is now available separately as a replacement part.
• 10177568Jun 29, 2020Electrical system, Engine. After starting the engine, the instrument cluster display (A40/16) may show "4MATIC inoperative" erroneously.Notes: Vehicles not equipped with 4MATIC are predominantly affected. However, in some circumstances a 4MATIC vehicle can also display this message. Previous software release of the instrument cluster control unit (N133/1) Ensure that no complaints exist regarding the 4MATIC system. If no other complaints…
• 10177567Jun 29, 2020Transmission and drivetrain, Electrical system, Engine. When leaving gliding mode, the transmission can shift to neutral by itself. The complaint only occurs in drive program E. Check software release of transmission control unit and perform a software update.
• 10177566Jun 26, 2020Fuel system, Electrical system. Check engine light active and FC P146264 Temp. and pressure sensor B4/7 is stored in engine control unit and tank control unit. Software parameter in Fuel pump control unit. Update SW in FSCU control unit.
• 10177565Jun 25, 2020Equipment. The mobile phone address book is not transferred completely to the multimedia system (COMAND or MBUX). In some cases, the call list shows just the telephone numbers but no names. The problem only occurs in conjunction with the iPhone and software version iOS 13.x.
• 10177563Jun 22, 2020Equipment. During a phone call, the Bluetooth connection between the MBUX multimedia system (A26/17) and a paired mobile phone may be briefly lost. The mobile phone will then reconnect with no user input.
• 10177560Jun 17, 2020Electrical system, Steering. Noticeable vibrations at steering wheel when parking or steering slowly while stationary. Possible controller oscillations in the electric power steering. Perform software update of the electric power steering.
• 10177559Jun 16, 2020Engine, Electrical system, Transmission and drivetrain. The following customer complaints may be noted: - "Service A/B Due" message is displayed in the instrument cluster before the appropriate mileage or date is reached - "Service A/B Due: Do you want to make an appointment?" pop-up message in the head unit display (see attachment) before the appropriate mileage or date is reached - "Your Mercedes-Benz _ is due for service." MMC service lead email or App message (see…
• 10177558Jun 16, 2020Electrical system, Seats. The seat heating in the vehicle cannot be activated. When the seat heating button is pressed the 3 red LEDs light up briefly and then go off again after a brief period (approx. 3 seconds). To prevent too high surface temperatures on the heating surfaces (and thereby any damage to the system), the cut-in frequency of the seat heating is limited.The new control units are available and can be ordered.

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