I was looking at the Brabus catalog for the SL (R129) and it recommended several different tire/rim combos -- see below.

I believe Brabus uses Eibach springs/Sachs or Bilstein shocks adjusted to their specs. AMG uses Eibach springs/Bilstein shocks modified to their specs. Both comes with a one-year warranty. Brabus lists for about $1800 ($1450 for a good deal). AMG is about the same, if not more. For my E430 (W210), AMG's suspension is 35% stiffer. I was looking for a more comfortable ride.

After researching the suspensions, I've recently replaced my springs with H&R Sports. I've retained the same shocks because I have less than 3,000 miles on them. I will replace it with either Bilstein or KONI in the future. You should also consider Eibach. The good thing is that H&R, Bilstein, and KONI have a lifetime warranty. I believe Eibach has a 10-year warranty.

I've also purchased Brabus 19'' Monoblock V, multi-piece rims. Fronts are 19x8.5 ET35 w/ P7000 235/35-19; Rears are 19x9.5 ET35 w/ P7000 265/30-19. This was a Plus 2 conversion. I initially thought that the ride would suffer greatly. After several miles, the combo has been great. A comfortable ride with great handling.

Brabus Application for SL (R129):

18''
Front 18x9.5 w/ ET (offset) 26: 245/40-18
Rear 18x10.5 w/ ET 20: 275/35-18 or 285/35-18

19''
Front 19x8.5 ET 25: 245/35-19
Rear 19x9.5 ET 25: 285/30-19

I hope this helps.

Eric

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'00 E430 w/ Solaris H-7's
Brabus 19'' Monoblock V, 2 piece
H&R Sport Springs

'99 SLK230 Sport