2020 Mercedes-Benz GLC 300 Technical Service Bulletins

228 technical service bulletins (TSBs) are on record for the 2020 Mercedes-Benz GLC 300. 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.

• 10181128Sep 16, 2020Steering. Cracking/Creaking Noises Coming From The Area Of The Mechanical Steering Column
• 10179973Aug 14, 2020Electrical system, Engine. Mercedes-Benz AG ("MBAG"), the manufacturer of Mercedes-Benz, has determined that on certain MY19-20 C-Class, GLC-Class, and AMG GT (205, 253, and 290 platform) vehicles, the software for the AMG drive unit control unit does not correspond to the current series production configuration. As a result, noise may occur from the engine mounts. An authorized Mercedes-Benz dealer will update the software as necessary.
• 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
• 10179955Aug 7, 2020Steering. Steering wheel heater and/or Distronic function limited
• 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
• 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.
• 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.
• 10177561Jun 18, 2020Electrical system, Transmission and drivetrain, Engine, Equipment. The check engine indicator light in the instrument cluster may be illuminated with one of the following fault codes: P261029, P02FF85, or P02FF02 stored in the engine control unit (N3/10). The time in instrument cluster is implausible due to an internal reset.
• 10177551Jun 11, 2020Electrical system, Equipment. Fault code B223209 is logged as "stored" in the parking control unit.
• 10176662May 21, 2020Electrical system. Fault code B223209 is logged in the parking control unit
• 10176663May 19, 2020Engine. Check engine indicator light active and fault code P261029/P02FF85/P02FF02 stored in engine control unit
• 10172683Feb 7, 2020Tires, Equipment. Information Label on Tire Sealant
• 10171646Jan 14, 2020Equipment. Audible fan noise from area of center console
• 10170545Dec 23, 2019Equipment. MBUX multimedia system: Mercedes-Benz service stations not available in Navigation menu
• 10169586Nov 14, 2019Equipment. EASY-Pack liftgate does not fully open
• 10164807Aug 19, 2019Steering. Assessment of actuating and operating noise from steering
• 10205242Nov 29, 2016Equipment. Navigation system permanently displays "Activating".
• 10205240Aug 29, 2016Equipment. Reset the customer-specific data and perform a software update of the AUDIO20 control unit.
• 10205247Aug 25, 2016Equipment. Traffic information service and posibly the voice control, nonfunctional after navigation software update.
• 10205241Aug 25, 2016Equipment. Navigation system permanently displays "Activating".
• 10205230Aug 15, 2016Equipment. CD/DVD No longer ejected or drawn in.
• 10205252Aug 11, 2016Electrical system. High voltage battery warning message in instrument cluster.
• 10205154Aug 5, 2016Engine cooling, Other or unknown. Gasket may settle causing a slight oil leak.
• 10205222Aug 1, 2016Exterior lighting. Operation complaints for LED headlamps.
• 10205214Jul 30, 2013Body and structure, Other or unknown. Noises when opening and closing automatic liftgate.

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