I would like to optimize my 10 month old SL 55 out of fun at Freud’ for moderate money still a bit, e.g. by using Shell V-Power and the necessary lifting of the limit to 95 octan, etc. Of course, I worry a little about letting any amateurs at the engine. Can someone tell me who is good in the industry at Mercedes Chip-Tuning, and maybe give me a few more hints? Thank you. Falk Kuebler