2021 Mercedes-Benz C300 Technical Service Bulletins

178 technical service bulletins (TSBs) are on record for the 2021 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.

• 10205807Aug 27, 2021Equipment. The Weather App will not populate local weather data based on current vehicle position.
• 10205814Aug 11, 2021Fuel system. Fuel filler flap opens slowly/switch flashes/tank is bleeding instrument cluster warning
• 10205801Aug 10, 2021Equipment. Intermittently after bus sleep the lower control panel LCP and upper control panel UCP may be panel UCP may be inoperable.
• 10199469Jul 23, 2021Equipment, Body and structure. Launch NCU - 2021060018 MY21 205 Check Left Front Door for Damage
• 10202531Jun 16, 2021Interior lighting. Touch pad: Search lighting does not dim or does not turn on.
• 10202530May 25, 2021Equipment, Electrical system, Engine cooling. Remote start causing CEL and U012600.
• 10195221Apr 20, 2021Electrical system, Equipment, Engine cooling. with engine M17x the ME Control Unit: "The Coolant Temperature is Below the Specified Temperature"
• 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
• 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
• 10191288Mar 19, 2021Electrical system. After ignition ON, the following message is shown on the instrument cluster: - "Unavailable! - ESP - Service Required"
• 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
• 10191278Mar 16, 2021Electrical system. Fault in 12 V interlock circuit
• 10191279Mar 12, 2021Electrical system. When ordering the electrohydraulic controller unit (EHS) using the part number stated on the EHS, the wrong parts may be ordered.
• 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…
• 10186148Dec 30, 2020Visibility (wipers, defrost, mirrors). Air Conditioning Intermittently Does Not Cool
• 10186141Dec 10, 2020Electrical system. NTG5.5: Incorrect time shown on instrument cluster, COMAND display, and analog clock
• 10205232Nov 30, 2016Equipment. Disturbed Antenna Signal.
• 10205242Nov 29, 2016Equipment. Navigation system permanently displays "Activating".
• 10205266Nov 21, 2016Equipment. Map pocket on front seat backrest trim does not close.
• 10205240Aug 29, 2016Equipment. Reset the customer-specific data and perform a software update of the AUDIO20 control unit.
• 10205223Aug 26, 2016Exterior lighting. Headlamp fog.
• 10205156Aug 26, 2016Transmission and drivetrain, Other or unknown. Intial startup not possible after replacement of transmisson 725.0 or of electrohydraulic controller 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, 2016Other or unknown, Engine cooling. Gasket may settle causing a slight oil leak.
• 10205215Jul 30, 2013Equipment, Vehicle speed control, Visibility (wipers, defrost, mirrors)…. Window lifter and outside mirror on passenger side malfunction after replacement of door control unit.

← All problems reported for the 2021 Mercedes-Benz C300