BMJR(Bill):

Have you looked at the fuel pump relay(behind the battery on 88-89 models). The 90-91 models have them within the MAS. Yours is easier/cheaper to replace.


There have been alot of write ups here on M103 motors exibiting the problem you describe and in many cases a faulty fuel pump relay was the problem. Some have even done some resoldering, but I wonder how long that holds.

Search around some more for faulty fuel pump relays on 103 motors, especially in 124 cars. They essentially have the same motor as your 300SEL and a fuel pump relay mounted around the battery.

This faulty fuel pump relay problems seems to surface once warm.

My 2 cents.

__________________
Mike Murrell
1991 300-SEL - Model 126
M103 - SOHC
"Fräulein"