W220 (2002 S430) Reliability?

[Eiknujrac]

I'm currently looking at purchasing a 02 s430 from the dealer, its certified with 25000 miles. My only question is this, on par with the rest of the newer benzes, how reliable is this car?

I say this because 6 months after I bought a 98 c280 for my son, I have had to replace the harmonic balancer (wasn't even fully reimbursed), motor mounts, combination switch, MAF sensor, and transmission! The car is still having suspension problems, but at this rate i'm determining if it would make sense for me to sell it for a more reliable car or to keep investing money into it.

Are there many common problems with this year of the w220? My w210 had the common rear window regulator problem, and this left me stranded for an entire weekend. (I couldn't safely park the car becuase the window was down, and the service department was closed for the weekend). I just don't want this car to be in a constant state of repair as have the last 3 benzes i've purchased.

Any input is helpful, thanks alot guys!