The W140 is a love / hate relationship. It's a great car when it drives well but as others have said the chassis is complicated and in order to get the soft ride the components are high wear and need replacement more frequently. Rear suspension lower transverse bushings are hydraulic and go south making for alignment problems, and they are no joy to press in either.

Also there's that awful vacuum setup to deal with and the transmission issues too.

Most W140's suffer from a lot of foregone maintenance that ends up reducing the price but also lumps all the cost burden onto the next owner....if there is one. And if it's a diesel you have the highly probable engine problems unless it's a respectable rebuild or a dealer installed replacement.

The AC evap issue is a huge expense and the soft close pumps fail often. The rear deck lids don't like to close properly all the time either. Rear doors suffer from broken or damaged stays which interfere with window regulators and end up breaking the regulators.

The list of faults is endless but they're still a joy to tool around in and on long drives a big plus.

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Steve A
92 W140 OM603
97 VW Jetta TDI
90 Passat variant TDI 6 speed MT
94 Chevy K1500 6.5TD
05 E320 CDI
+ others