Dad is looking to buy one.
What should we look for?
My uncle had a 2000, the airbags on the suspension failed like 3 times in 2 years.
Get a 2003 S600 so you have twin turbos and the V12.
Spend money on an LSD and drag radials and a reflash, run 11’s at over 130mph.
Oh, you said for your dad.
Nevermind suggestions still apply 
A very very good service contract
It boggles my mind how these top of the line sports cars can come with an open diff.
It’s a top of the line luxury car. It’s also easier for the manufacturer to tune stability control with an open diff.
ah poop, i was thinking of the SL.
my bad. but still.
simple. most people who buy these aren’t beating the ever living christ out of them. they cruise and enjoy their vehicles, occasionally making someone look like an ass.
TERRIBLE electrical problems… other than that… solid, great car… only downside is, electrical problems for an S is EXPENSIVE, and its going to be out of warranty
Well, the fucking 500 only makes 304HP, wtf…
if you can get a warranty with it, good, if not… good luck…