Don't feel bad. I finally got tired of guessing where drive was too and I remember I had trouble getting the bulb out. I don't remember what I did to get it out, but I do remember feeling pretty stupid about how simple it was when I finally figured it out.

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1993 400E, 256,000 miles (totaled)
1994 E420, 200,000+ miles
1995 E420, 201,000 miles