First time i hafta post something, usually find everything i need just by searching!!

Anyway, i have a 1995 E420 with 112k miles.
On the driver side above the transmission oil pan right below the vacuumline theres a switch of some sort. Its got a wire attached to it that goes somewhere else. Whats the name of that part ?
Ive developped a small leak there and need to replace the part. I was thinking starter lock out/backup lamp switch? I have a whole stack of books and cd`s for the car but cant find that part anywhere.
Anyone got any idea what im talking about ?
Tr|cks