I thought about it before, but only pressed "START" once, no light lit up, cannot change the mode.awesome, thanks. How'd you figure that out?
press the start button twice, until you can move the dial from comfort to sport and sport+. Make sure you keep your foot off the break, you dont want to start the car, just get the accessories on. Once it's in sport +, apply the break and push the start button again.Doesn't seem to work on my GLE450.