To solve a stalling problem on my 91 190e, i bought a fuel pump relay and it's part number was 003 545 24 05.

I asked told the shop guy that the part number did not seem correct and he told me that it was for a 300e (6 cylinder) but it would work in a 190e.

These guys have been around for a long time and I believe they know from experience.
Cheers.

Azhari
1991 190e 1.8
Singapore