Senner Tuning Mercedes SLS program - $25k buys you 35 horses, wheels, and a coil-over suspension
We are not huge fans of big name European tuners. Why? Their stuff is overpriced and underperforms. They seem to live off their brand name more than anything else. Case and point, the Senner offering for the SLS. Senner tunes the ECU and adds an exhaust system (rear section only) for a bump of 35 horses. In addition they give you their gaudy 20 inch wheels and the KW coil-over suspension. One is better off taking the $25k and simply getting the car supercharged for massive gains or just getting an ECU tune from someone else for more power. Combine that with a good full exhaust system and pocket the change with better results.