Originally Posted by Ashman

I havent done it to a w126, but I have done it to an 81 2d0D, and plenty of W124s.

you will need to wireup relays to activate the central locking on the w124, same should apply to a w126, otherwise you need to put an actuator on the drivers door to pull that lock down which will in turn activate the rest of the vaccum locks.

if you want a wiring diagram which tells you which wires are tobe hooked up to the aftermarket alarm, I can get one. It is not an mb wiring diagram, it would be from audiovox.

Alon