What kind of suspension do these Euro's have.

I know with the 560SEL (1986 on?) they went to the air suspension and added considerable weight.
My US version 500SEL has a more traditional suspension, and the power to weight ratio seems good for such a nice ride.

Also - regarding the exhaust.
You can purchase the "euro spec" exhaust suystem - complete from timevalve.com. If I wanted the extra Hp - will this fit directly onto my car, or are there more modifications to be had? Will my EGR and any other sensors need to be disabled/reworked?