Report: Dead Battery Due to Failed Seat Control Module
Mercedes-Benz C320 Problem
Average Mileage: 86,352 mi (45,000 mi - 183,315 mi)
A dead battery can be caused by a faulty seat control module that does not properly shut down. Spilling liquids on the front seats can cause these modules to fail.
Visitor, 2002 Mercedes-Benz C320, 48,600 mi
Faulty seat control module. Quick fix published here
Dead battery due to failed seat module to mee too. I have have mercedes roadside come out and replace my battery 3 times, for which I had to purchase one, In a matter of one year. First they unplugged my passenger seat stating that it was draining my battery. The last or third time they replaced my battery they unplugged the drivers seat stated that too was draining my battery. I understand that this may have been a recall and I was never aware of the recall when I purchased this in 2002. Now I and a passenger in my car cannot adjust the seats. It would be good I get an apology from Mercedes and repair this!
Battery Drain. 1.3 amp draw on battery when vehicle is turned off draining battery very quickly. Likely the SCM's not "sleeping". This is ridiculous(fraudulent) considering the frequency and number of reports that these Seat Control Modules haven't been recalled and batterie charged or replaced at Mercedes Benz expense.
Visitor, 2001 Mercedes-Benz C320, 65,900 mi
Common problem. Dealer wanted $500 for a new seat module. Instead of buying the seat module I bought a $3 "momentary on button" at the auto parts store, cut the ground wire to the seat module and connected the ends to the "momentary on button." Then I mounted the momentary on button on the underside front of the seat. Adjusting the seat became a two-handed affair, holding the momentary on button with one hand while using the other hand to use the adjustment controls, slightly more complicated than original, but saved $500 by not buying the module. The momentary on button connected in this way interrupts the current to the module when it is not in use, that way you won't drain your battery.
Visitor, 2002 Mercedes-Benz C320, 50,500 mi
battery kept dying, replaced battery, problem returned after two days, diagnosed as bad seat module, was told only dealership could fix, this car has cost me a fortune
Visitor, 2001 Mercedes-Benz C320, 128,000 mi
This has caused me unbelievable problems. Where and how do I fix it??
i have to unplug my front passenger seat so that the battery will not die. I was told by a mechaninc to just keep the seat unplugged until I am ready to fix it.
Visitor, 2002 Mercedes-Benz C320, 70,000 mi
Mechanic has traced my recurrent dead battery problem to the passenger seat module. It seems more than one owner has had this problem, why hasn't Mercedes Benz issued a recall? They continue to deny this is their problem!
Visitor, 2001 Mercedes-Benz C320
i have same problem with my seat module causing dead battery on both side passenger and driver. I have to leave them unplugged to avoid the high cost repair.
Visitor, 2001 Mercedes-Benz C320, 125,000 mi
In 2005, I had my car towed due to the fact the alarm would go off due to low battery?? which was ultimately the result of failed seat control module. Cost ~600