I have a 2008 GL450. I've been having weird issues with it. Here are some of them. You can be driving down the road and your seat belt sign just pops up on the dash even though its connected. I tried disconnecting my belt and reconnecting it but it doesn't go away. Another one is various lights will come on the dash like the caution light, esp light, or abs light, or the car won't shift out of park or neutrel. They either go away by themselves after driving a little or sometimes they disappear after shutting off and re starting the car. Anyone have this happen to you?

 

have your battery load tested and terminals cleaned/ retightened

 

as mentioned above and also the break light switch failing can cause ABS, ESP and one or two other lights to come on.

Dan