Lifetime Premium Member
Date registered: Nov 2002
Vehicle: 2003 G500, 2000 SL500, 1995 E320 Cabriolet, 1980 TR8
Mentioned: 6 Post(s)
Quoted: 93 Post(s)
You may find that your ESP problem returns in the future. With bigger tires, the apparent vehicle speed is slower than the actual speed which plays havoc with the yaw/acceleration sensor in the ESP system. There are many threads on other forums (P3) about this issue. If you change the R & P ratio, the TC controller will need to be re-programed for the new ratio or you will be in limp home mode. The ABS sensors and the transmission output speed sensor talk to the TC controller effectively allowing it to "test" the axle ratio and throw a fault if things don't match up with the stored values. I know that reprogramming can be done on older Gs, but I'm not sure about a new G63.
Floobydust: a contemporary term derived from the archaic Latin miscellaneous, whose disputed history probably springs from Greek origins (influenced, of course by Egyptian linguists) - meaning here "a mixed bag." - National Semiconductor Audio Handbook