I just bought a 2004 SL55 AMG 4 weeks ago. I have a question about the shift mode where you hold the gear shift lever all the way to the left and it should choose the proper gear for maximum acceleration. I tried this a few times but I think I'm not getting it right. Most times it revs so much I think its going to hit the rev limiter so I shift it up my self. One time I did it stopped at a light and the gear indicator went to 1 and shifted briskly up to 4. How does yours actually work?