1987 300E M103 engine, started to develop a gas odor at idle or when parked in the garage after arriving home. Sometimes, quite pungent. So on a cold engine, I removed the air filter, exposed and wiped down the EHA, and started it up....sure enough, it's weaping from the body of the EHA and not from the seals. Crap. So I ordered a new EHA and it's en route...
But here's my question: is it a bolt on job? I've read that some EHA's need calibration? Would it come calibrated or is it engine specific and I would need to do that? (not sure how to, nor would I have the tools)
Thanks guys.
Cam

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1987 300e W124 M103 My baby.