I would hang on to the 400E, in 1992 Mercedes was at the top of it's technical reliability and the 400E will be a cheaper car to run. The front drive axles are a weak point in the E430.

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600SEL '91
300E 4Matic '88
240D '83
280SE '77
350SE '73
The most complex systems can fail in the simplest way.
Contra verbosus noli contendere verbis, sermo datur cunctis, animi sapientia paucis.

i don't believe in the lord! He's never bought me a Mercedes Benz.