1992 500E as stated in the title the fuel pump will run when ever it wants. It usually runs for 2 minutes after you shut off the car. After that it will continuously turn on and off literally hundreds of times till the battery is flat. Usually after a day and a half the battery is done, now it's only a day as the battery is taking a beating through all this. I have swapped the ecu which made no changes, and I haven't changed the relay YET. Any ideas in case the relay isnt the issue?
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