I looked at a 300 this weekend that had the starter on the passenger side.

So yours is on the drivers side? Are you sure you are getting the correct starter? When they die, what dies in them? If you are chewing up the bendix drive (the overrunning clutch) you probably have a mucked up flywheel

The diesel engines use a much heavier starter than the gas engines.

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My first Mercedes Benz. 4/6/07.

1984 190E (201 024) 2.3L four.