Thank you guys for your help. I am going to purchase another pump so I change both at the same time.

Does anyone know why Mercedes made the change from 1 to 2 fuel pumps???
I have been trying to think of some logical reason for the design but I am drawing a blank.

Just wondering...

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Jason B.

420sel '89' 171K---Currently my daily driver

380sel '83' 122K---My first Mercedes!