I'm broke down out of state. Can some one give me the pinout on 126 gas for the fuel pump relay so I can jumper it to see if I need a new pump or relay. Thanks, library closes in 5 minutes

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85 300 SD ~ 115K
82 500 SEC Euro ??K
78 450SL 164K

If that car has the M103 then I think you can try jumping pin 87 & 30 on the fuel pump relay.

This is Jim's wife-he does not have computer where he is but, tried the connections you said & it started. Thank You!

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85 300 SD ~ 115K
82 500 SEC Euro ??K
78 450SL 164K

Glad you got it started. Happened to me several years ago, and if it wasn't for that trick, I would have had to tow the car home. Luckily I drove it home, swap the fuel pump relay drove it like normal.

After a extended vacation the 300Se 103 engine refused to start . i removed the cover of the relay and pushed the inner relay contacts together ,instantly the buzz of the pump was audible ,even the ignition does not have to switched on . relay replaced .
For utter reliability of the `103 engine i have found it is best to replace the following ageing and worn out components .

fuel pump relay ( initially as stalling problems )

fuel accumulator ; ( hot starting problems)

all the old fuses ( intermittent electrical problems )
OVP (cold start problems ,ABS light )

replacing these makes the car very reliable .
mak

Does your car have the separate fuel pump relay or the MAS relay? If it's the MAS, how did you get the cover off? I'd like to check mine, but I don't want to break something more than it is.

Can someone tell me where is the pump relay on a 96e320,please, its not on the back seat

Your '96 model doesn't have a separate fuel pump relay Pin.