No, Not yet, I am planning on it however.

I do have AMG 17x8 ET28 Aero wheels on my coupe though, actually I have three sets of those wheels. Right now I am on pirelli P7000s, but My pilot sport a/s tires ride much better than even the stock tire size.

I think instead of messing with the swaybar on the top of the car, I am going to make a lower sway bar to fit down there.

Putting on a wagon sway bar is a good improvement.

when I take my engine out I am going to put on 560 SEC brakes on the front, which will be pretty soon.

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Current Stable:
1994 S500 v140, 210k miles, white with grey.

Former Mercedes in the Stable:
1983 300CD Turbo diesel 515k mi sold (rumor has it, that it has 750k miles on it now)
1984 300CD Turbo Diesel 150 k mi sold
1982 300D Turbo Diesel 225 sold
1987 300D Turbo Diesel 255k mi sold
1988 300 CE AMG Hammer 15k mi sold
1986 "300E" Amg Hammer 88k mi sold (it was really a 200, not even an E (124.020)
1992 500E 156k mi sold
etc.