It seems that Mercedes-Benz’s problems with electronics are still happening. The company is now recalling 404 units of 11 different models, including the 2009 SL and SLK, to fix a software problem that could result in problems with fuel gauge readings and the speedometer.

Here are the models affected:

2006-’08 M-Class and R-Class

2005-’09 SLK

2005-’08 C-Class

2003-’04 and 2006-’08 CLK-Class

2003-’08 E-Class

2004 and 2008 CL-Class

2008 CLS-Class

2004 and 2007-’08 S-Class

2003 G-Class

2003-’04, 2006 and 2009 SL-Class.
Documents filed recently with the National Highway Traffic Safety Administration (NHTSA) state that Mercedes-Benz said the problem involves an incorrect software calibration number coding. Furthermore the NHTSA stated that the problem “can affect a number of vehicle safety and emission functions.”

Problems can range from faulty fuel-gauge readings, a stuck fuel-level sensor that may not be displayed in the instrument cluster, and a check-engine light that may illuminate incorrectly, to a speedometer that “may be out of tolerance.” This basically means that the speedo is giving you an incorrect reading.

But the part that sticks out to me the most in the NHTSA’s report is this; “In the event of a vehicle crash, the electrical fuel pump may not receive a crash signal that is required for the fuel pump to disconnect and prevent future fuel delivery as designed.” You see when a modern car is in a crash the car’s ECU sends an emergency signal for the fuel pump to stop pumping fuel. This prevents fires from occuring after a crash and is a major safety feature. If this system is faulty, I would not even drive the car, it’s that important.

Though the recall is expected to begin in August, I would take action now. Dealers will recode the software calibration number at no charge and even can provide a loaner car if necessary.

For any further information contact Mercedes-Benz directly at the number below:

Mercedes-Benz Customer Service:  1 (800) 367-6372.