I have a 1996 C280 in which the lock have stopped working. I have the Infared system with the RED/GREEN Led on the rear view mirror.

I had tried everything that I could think of and finally took it to the dealer. The dealer spent 1 1/2 hours before they called to see they should spend the next 3-4 they thought it would take.

That's a possible 5 1/2 hours x $92 = $506 for my locks.

The dealer says that there has to be a leak in the system to one of the doors and if one of the doors has a leak then none will work.

So I took it home and started playing around with everything that I could think of out of the ordinary and came up with this.

If I manually push the locks down by hand, then hold the TRUNK release button, all of the doors unlock ! So I have air going to each door.

Any ideas ? This must mean that the pump is working, the lines are working, any electronics are working. The LED flashes RED-GREEN at the same time when pressed.

But, the gas theft deterent works while using the key remote...

Help please !!

Thanks