We have a 1997(P) E230 estate. The electric windows and door mirrors have stopped working, we are told that the "master control unit" for controlling the electric windows is under the back seat, and that it is definitely this that needs replacing (the unit got wet and this is when the problem started). Try as we may nobody seems to know what this part is called or what the part number is :?. PLEASE, PLEASE CAN ANYBODY HELP?