Plastic rocker panel on the driver's side was replaced at 13,000 miles.
The right tie rod end was replaced at 20,000 miles.
The driver's seat heater coil was replaced at 21,000 miles.
There is a serious front tire vibration at 70 miles per hour.
The SLS handles very well as an American sports sedan.
The car is very responsive and has superior acceleration.
However, the overall quality of the car is very suspect relative to the high sticker price.
Tire vibration is the latest issue, and it appears others are having the same problem.
You might try different tires. I don't know why, but I installed a set of Goodyear Eagles on my STS and the vibration ended.