2008 Mercedes-Benz CLS550 Fuel system Problems
- Complaints
- 5about this part
- Share
- 29%of 17 total for the year
- Median mileage
- 42,500miles
- Trend
- Not enough dataFewer than 15 complaints, too few for a reliable trend.
NHTSA recorded 5 complaints about the fuel system of the 2008 Mercedes-Benz CLS550, 29% of the 17 complaints for this model year. Where a mileage was given, the median is 42,500 miles.
Fewer than 15 complaints name this part, so treat the figures as a rough indication only.
Example complaints
Selected from NHTSA records; personal details are removed. They are consumer reports, not findings.
“I pulled into a service station to fill my tank. After adding fuel to capacity I began to smell fuel in the passenger compartment. I attributed the smell to possibly spilling fuel on myself. I drove the vehicle to work and then home. The next morning I continued to smell fuel in the passenger compartment. I took the vehicle to the dealer for diagnosis and was told that there was a leak in the tank that was splashing / venting into the passenger compartment. The service technician shared that this was a common problem with the cls.”
NHTSA complaint #10604989, filed 2014-06, 16,000 miles“On march 10, 2012 my wife started the aforementioned vehicle and immediately began to smell gasoline fumes in the passenger compartment. As she exited the parking garage, the toxic fuel smell became unbearable and she immediately turned- around, re-entered the garage, quickly shut off the car and exited the vehicle for fear of fainting and / or an explosion. …”
NHTSA complaint #10503839, filed 2013-03, 55,000 miles“Leaking fuel around the fuel sending unit under rear seat behind driver, filling the passenger compartment with gasoline fumes, after filling the car up with gasoline.”
NHTSA complaint #10926259, filed 2016-11, 112,000 miles“The failed component of the car was the drivers side fuel transfer pump. After noticing the faint smell of gas in my car i checked under the rear driver side passenger seat. I was shocked to find more than 16 fluid ounces of gas floating freely around the well of the gas pump.the insulation under the rear passenger seat is soaked in gas. I can only imagine what could’ve happened if there was an accident or if someone even sparked a cigarette in my car. Not only is this extremely dangerous, there are negative consequences that result from inhaling gas constantly while driving. …”
NHTSA complaint #11638320, filed 2025-01Related service bulletins
- 10058130Jun 10, 2015Mercedes-benz model years 2003-2009 model 211, model years 2006-2011 model 219: fuel odor in the area of the fuel tank . Warranty extension has been issued on fuel tank…
- 11031595Jan 10, 2015In our continuing efforts to enhance the satisfaction of our customers, Mercedes-Benz USA, LLC (MBUSA) has decided to extend the warranty for certain fuel tank components in…
- 11031732Jan 9, 2015In our continuing efforts to enhance the satisfaction of our customers, Mercedes-Benz USA, LLC (MBUSA) has decided to extend the warranty for certain fuel tank components in…
Fuel system: other model years
Other parts of the 2008 Mercedes-Benz CLS550
3 complaintsElectrical system
3 complaintsEngine
2 complaintsSuspension
2 complaintsBrakes
1 complaintsElectronic stability control
1 complaintsExterior lighting
1 complaintsOther or unknown
1 complaintsSteering
1 complaintsTires
1 complaintsTransmission and drivetrain
1 complaints
← All problems reported for the 2008 Mercedes-Benz CLS550
About this data. Data from NHTSA (ODI) complaints, recalls, TSBs and investigations, updated Nov 1, 2026. Complaints are unverified consumer reports and may be duplicated or inaccurate.
To check a specific vehicle for open recalls, use its VIN at nhtsa.gov/recalls. Methodology