You need to find the part number on the pump! There are 4 different versions out there, the number looks like this: A124460**80 i need the two digits that are missing. Have you replaced the fluid and filter?

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600SEL '91
300E 4Matic '88
240D '83
280SE '77
350SE '73
The most complex systems can fail in the simplest way.
Contra verbosus noli contendere verbis, sermo datur cunctis, animi sapientia paucis.

i don't believe in the lord! He's never bought me a Mercedes Benz.