My 18 years old 560SEL has been doing well after I spent 1.7K to fixed up what had gone bad 4 years ago. My family bought the car in 1986 and I inherited it since my mother cannot drive anymore. So far, other than the normal wear and tear, the big sedan still runs smoothly and still can feel the power of the engine.

And my 8 years old S500 coupe had gone through 7K or repairs and thankfully, all before the extended warrantee expired.

The driver seat control $1200 part.
Air con pressure line
steering pump
master cylinder
rear sunshade switch


But both are still a pleasure to drive.