TSB: MERCEDES BENZ C, C CLASS, C-CLASS, C300, C350, C63, CL CLASS, CLK CLASS, CLS CLASS, GLK350 (2005–2010)

Bulletin LI-54-21 — December 17, 2009

Bulletin Details

Bulletin IDLI-54-21
ManufacturerMERCEDES BENZ
ModelsC, C CLASS, C-CLASS, C300, C350, C63, CL CLASS, CLK CLASS, CLS CLASS, GLK350
Model Years2005–2010
Date IssuedDecember 17, 2009
Date Added to NHTSANovember 1, 2010
ComponentELECTRICAL SYSTEM
Vehicles Affected42 combinations

What is a TSB?

A Technical Service Bulletin is a document issued by the vehicle manufacturer to inform dealership technicians about a known issue and the recommended repair procedure. TSBs are not mandatory recalls — they serve as repair guidance for common problems.

If your vehicle has this issue, bring this bulletin ID to your dealer. If under warranty, the repair should be covered at no cost.

Summary

DAIMLER/XENTRY: FUEL LEVEL INDICATOR AND RADIO FREQUENCY CENTRAL LOCKING INOPERATIVE, INSTRUMENT CLUSTER REPORTS TURN SIGNALS INOPERATIVE, DIAGNOSIS OF REAR SAM NOT POSSIBLE. CONTROL MODULES. MODELS C CLASS, MODEL SERIES 204. NO MODEL Y

Affected Vehicles

MakeModelYearComponent
MERCEDES-BENZ C 2010 110000 ELECTRICAL SYSTEM
MERCEDES-BENZ C300 2010 122000 EXTERIOR LIGHTING:FOG LIGHTS
MERCEDES-BENZ C300 2010 121300 EXTERIOR LIGHTING:HEADLIGHTS:HIGH/LOW BEAM DIMMER SWITCH
MERCEDES-BENZ C63 2010 122000 EXTERIOR LIGHTING:FOG LIGHTS
MERCEDES-BENZ C63 2010 121300 EXTERIOR LIGHTING:HEADLIGHTS:HIGH/LOW BEAM DIMMER SWITCH
MERCEDES-BENZ GLK350 2010 122000 EXTERIOR LIGHTING:FOG LIGHTS
MERCEDES-BENZ GLK350 2010 121300 EXTERIOR LIGHTING:HEADLIGHTS:HIGH/LOW BEAM DIMMER SWITCH
MERCEDES-BENZ C300 2009 122000 EXTERIOR LIGHTING:FOG LIGHTS
MERCEDES-BENZ C300 2009 121300 EXTERIOR LIGHTING:HEADLIGHTS:HIGH/LOW BEAM DIMMER SWITCH
MERCEDES-BENZ C63 2009 122000 EXTERIOR LIGHTING:FOG LIGHTS
MERCEDES-BENZ C63 2009 121300 EXTERIOR LIGHTING:HEADLIGHTS:HIGH/LOW BEAM DIMMER SWITCH
MERCEDES-BENZ GLK350 2009 122000 EXTERIOR LIGHTING:FOG LIGHTS
MERCEDES-BENZ GLK350 2009 121300 EXTERIOR LIGHTING:HEADLIGHTS:HIGH/LOW BEAM DIMMER SWITCH
MERCEDES-BENZ C-CLASS 2008 110000 ELECTRICAL SYSTEM
MERCEDES-BENZ C300 2008 122000 EXTERIOR LIGHTING:FOG LIGHTS
MERCEDES-BENZ C300 2008 121300 EXTERIOR LIGHTING:HEADLIGHTS:HIGH/LOW BEAM DIMMER SWITCH
MERCEDES-BENZ C350 2008 122000 EXTERIOR LIGHTING:FOG LIGHTS
MERCEDES-BENZ C350 2008 121300 EXTERIOR LIGHTING:HEADLIGHTS:HIGH/LOW BEAM DIMMER SWITCH
MERCEDES-BENZ C63 2008 122000 EXTERIOR LIGHTING:FOG LIGHTS
MERCEDES-BENZ C63 2008 121300 EXTERIOR LIGHTING:HEADLIGHTS:HIGH/LOW BEAM DIMMER SWITCH
MERCEDES-BENZ GLK350 2008 122000 EXTERIOR LIGHTING:FOG LIGHTS
MERCEDES-BENZ GLK350 2008 121300 EXTERIOR LIGHTING:HEADLIGHTS:HIGH/LOW BEAM DIMMER SWITCH
MERCEDES-BENZ C350 2007 122000 EXTERIOR LIGHTING:FOG LIGHTS
MERCEDES-BENZ C350 2007 121300 EXTERIOR LIGHTING:HEADLIGHTS:HIGH/LOW BEAM DIMMER SWITCH
MERCEDES-BENZ C63 2007 121300 EXTERIOR LIGHTING:HEADLIGHTS:HIGH/LOW BEAM DIMMER SWITCH
MERCEDES-BENZ C63 2007 122000 EXTERIOR LIGHTING:FOG LIGHTS
MERCEDES-BENZ GLK350 2007 122000 EXTERIOR LIGHTING:FOG LIGHTS
MERCEDES-BENZ GLK350 2007 121300 EXTERIOR LIGHTING:HEADLIGHTS:HIGH/LOW BEAM DIMMER SWITCH
MERCEDES-BENZ C CLASS 2006 110000 ELECTRICAL SYSTEM
MERCEDES-BENZ C350 2006 121300 EXTERIOR LIGHTING:HEADLIGHTS:HIGH/LOW BEAM DIMMER SWITCH
MERCEDES-BENZ C350 2006 122000 EXTERIOR LIGHTING:FOG LIGHTS
MERCEDES-BENZ C63 2006 121300 EXTERIOR LIGHTING:HEADLIGHTS:HIGH/LOW BEAM DIMMER SWITCH
MERCEDES-BENZ C63 2006 122000 EXTERIOR LIGHTING:FOG LIGHTS
MERCEDES-BENZ CLK CLASS 2006 110000 ELECTRICAL SYSTEM
MERCEDES-BENZ CLS CLASS 2006 110000 ELECTRICAL SYSTEM
MERCEDES-BENZ GLK350 2006 121300 EXTERIOR LIGHTING:HEADLIGHTS:HIGH/LOW BEAM DIMMER SWITCH
MERCEDES-BENZ GLK350 2006 122000 EXTERIOR LIGHTING:FOG LIGHTS
MERCEDES-BENZ C350 2005 121300 EXTERIOR LIGHTING:HEADLIGHTS:HIGH/LOW BEAM DIMMER SWITCH
MERCEDES-BENZ C350 2005 122000 EXTERIOR LIGHTING:FOG LIGHTS
MERCEDES-BENZ CL CLASS 2005 110000 ELECTRICAL SYSTEM
MERCEDES-BENZ GLK350 2005 121300 EXTERIOR LIGHTING:HEADLIGHTS:HIGH/LOW BEAM DIMMER SWITCH
MERCEDES-BENZ GLK350 2005 122000 EXTERIOR LIGHTING:FOG LIGHTS

Related MERCEDES BENZ Recalls

CampaignModelYearComponentSummary
GLS 450 4MATIC 2026 AIR BAGS:PASSENGER SIDE FRONTAL:CUSHION Mercedes-Benz USA, LLC (MBUSA) is recalling certain 2026 GLE 350 4MATIC, GLE ...
GLE 580 4MATIC 2026 AIR BAGS:PASSENGER SIDE FRONTAL:CUSHION Mercedes-Benz USA, LLC (MBUSA) is recalling certain 2026 GLE 350 4MATIC, GLE ...
AMG GLS63 4MATIC 2026 AIR BAGS:PASSENGER SIDE FRONTAL:CUSHION Mercedes-Benz USA, LLC (MBUSA) is recalling certain 2026 GLE 350 4MATIC, GLE ...
AMG GLE63 S 4MATIC 2026 AIR BAGS:PASSENGER SIDE FRONTAL:CUSHION Mercedes-Benz USA, LLC (MBUSA) is recalling certain 2026 GLE 350 4MATIC, GLE ...
GLE 450E 4MATIC 2026 AIR BAGS:PASSENGER SIDE FRONTAL:CUSHION Mercedes-Benz USA, LLC (MBUSA) is recalling certain 2026 GLE 350 4MATIC, GLE ...

What Should You Do?

If your vehicle is affected by this TSB, contact your authorized MERCEDES BENZ dealer. Bring this bulletin ID (LI-54-21) when you visit. If under warranty, the repair should be free. If your warranty has expired, ask about goodwill coverage — manufacturers sometimes cover TSB-related repairs beyond the warranty period.

Frequently Asked Questions

A recall is a mandatory safety fix — the manufacturer must repair every affected vehicle for free. A TSB is an advisory document that describes a known issue and the recommended fix, but repairs are not required. However, some TSBs eventually lead to recalls if the issue poses a safety risk. TSBs are generally issued for quality or performance problems, while recalls address safety defects.

If your vehicle is still under the manufacturer's warranty, TSB-related repairs are typically covered at no cost. If your warranty has expired, you can ask the dealer about goodwill or customer assistance programs. Many manufacturers will cover or partially cover repairs for well-known issues, especially if the TSB was issued recently or affects a large number of vehicles.

Check the make, model, and model year listed above against your vehicle. If they match, this bulletin likely applies. However, TSBs may only affect vehicles with specific production dates, VIN ranges, or configurations. Your dealer can confirm by entering your VIN into their service system, which will show all applicable TSBs and recalls.

This data comes from the National Highway Traffic Safety Administration (NHTSA). Manufacturers are required to submit copies of all communications (including TSBs) sent to their dealers to NHTSA. The agency makes this data publicly available as part of its vehicle safety monitoring program.