I have a 2003 W211 E500 (the 5.0l) that seems to be stuck in Sports transmission mode. As a result when putting it in drive it is "stuck" in 2nd great. It has the 5G-tronic, so is drivable. the dash computer says No Malfunction, but it will only stay in S mode. Park, Reverse all work completely fine, it's just like driving a manual car with only 2nd gear. I have done the Transmission reset I found online, but it is some thing else.
Please let me know if you have experienced anything like this or know what to do :-)