check the computer that sits behind the firewall on the passenger side of the car (should be some screws holding the foam in, remove those) i remember seeing some posts on this forum and other's stating problems with e36's after going through an auto car wash.
i saw some guy sprinkle petrol on d ignition coil after an engine wash (it was aNissan quest). On a more serious note, pls check d relays Fuel pump especially. A friend had similar issues said it was a white relay, just toggled it a little and cranked.
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