I have been looking for the fuel pump relay switch on a 1980 280 TE Euro model Mercedes for 3 days now! No one seems to know wherwe it is located on this car.
Could someone please help!!!

Part number !!

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1994 E500 (MY SUNDAY DRIVER)
1993 190E SPORTLINE LE W/ M104 SWAP
1997 C230
2002 ML320
2000 BMW 528I (WIFEY'S CAR)

"Excuses are crutches for the unfounded."

Adriel,
I have an '85 500SEC, and the relay is in the fuse box.
It looks like a black box, 1/2 the size of a pack of cigarettes.
Not sure what your problem is/was, but mine had a bad solder joint, on the solenoid operating the fuel pump. A few minutes with a soldering iron and it hasn't missed a beat since.
Good luck, John F.