Below is a quote from an earlier post made by Steve Brotherton:

"The easiest way to do what you desire is to pull the relay, construct a jumper with a fuse inline and jump the relay socket between term 30 and term 87."

This is how you bypass the fuel pump relay(FPR).

This WEB site has a section called BuyParts. Go look up the FPR for your car. Should be a photo of it there and I believe in your case it's located behind the battery. If you jumper it and the car continues to run, the FPR is faulty.

You're lucky if this is the case as the stand-alone FPR is not that expensive. The one's that are integrated into a MAS controller(1990-1991) cost around $500. Yours will be much less.

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