Originally Posted by GTR DRAGON
I was looking at couple M-Benz & Audi forums/threads, and there were alot of satisfied people that went with speedtuning...
I'm going to try speedtuning out ($275 and a money back guarantee is worth a try).
I will post full review when the chip installed.
I have seen lots of people say they are happy with Speedtuning for MB's but I have yet to see a single shred of evidence the ECU actually works. I have not seen one before and after dyno.
I have seen a number of dyno's for Kleeman, RENNtech, and PowerChip.