74mm Throttle Body, **Sold**
I have since put the stock one back in trying to figure out problems on the car, came down to the pedal assembly.
Crossfire Throttle Body SLK280 C280 W163 W203 R171 1131410125 1121410325 171019 | eBay

Rear Hub & Bearing,
Bought to replace mine because I had a few stripped threads, local shop was able to re-thread them saving me time and money but now I'm stuck with this, brand new and never installed.
Wheel Hub and Bearing Assembly REAR 831-54001 Mercedes-Benz SLK320 01-04 | eBay

2 Springs from my ground control kit, very shortly after buying the kit I ordered smaller and stiffer springs from Ground Control and they wouldn't take back these for any credit and now I have been holding onto them for almost a year, will consider any offer since I have no use for them now.
Eibach 9" Springs 0900.225.0800 | eBay

Willing to do any of it through pay-pal if preferred, Ebay is also fine.
Hoping to sell all of these soon.
Let me know !