Thanks. I actually deformed the oil pan on my 92 Chevrolet Z-28 by using the wood/floor jack technique to change motor mounts, so that's what made me ask the question.

I can't find the site now, but I recall reading that Porsche had to beef up the suspension and chasis of the 500E (which has virtually the same M119 engine as my E420) to accomodate the increase weight over the 300E engine. I thought I remembered reading that it was a few hundred pounds heavier than the 6 cylinder in the 300E.

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