I have a 95S420. The interesting thing is my remote fobs don't have any led indicators. Only the door handles light.

Non the less, when I first got the car, one of the fobs didn't work, even after replacing the batteries. With mine, in the battery holder area (uses two dime sized but thicker batteries), the contact that leads to the top most battery along the side of the case was contacting the battery below it. Effectively shorting the top battery out. Have a good look. I tried bending it back without success and ended up using paper and glue to place an insulator along the side.

By the way, seperating these things is a devil. There is a link in the forum to assist (can't remember the name though).

Ron

__________________
1995 E320 -171k-km
1995 S420 -333k-km