I have a 2001 C320 seat control module that drains my battery flat overnight. There are three wires in the harness. A ground wire and two power wires, one that is energized by turning the ignition on and one that has constant power. The latter is for the convenience mode which pushes back the seat and puts the steering wheel out of the way for easy in and out access to the drivers seat. This constant power wire is what drains my battery and the mercedes forum suggests splicing this wire to the ignition only wire so no power is drained when the keys are off the ignition. What I am afraid of is overloading the ignition only wire. if I do this, is it possible to put a relay? Is there an advantage in putting a relay? If there is, can I use the existing three wires to hook up the relay and are there any better suggestions in wiring the relay. I don't have a problem losing the convenience mode. I can live with that. I just want to avoid draining my battery and also avoid spending for 2 new control modules which costs around $500 each from the stealership and a possiblity of these new modules to do the same eventually. Need Help in getting this car ready for my new teenage driver.
Thanks Folks
Thanks Folks