Hello scotty! I have a 2015 gl450 with 153000 miles. I have been experiencing 2 main issues with it as of late. 1 when I open it up trying to accelerate on the highway I am given barely anything, the response is akin to my 2008 base model v6 Silverado (yes that slow) I know this is wrong because I actually own 2 of them and the newer one with the same engine works as it should. Additionally when going on long trips usually 7+ hours including stops for gas it begins to from what I can tell shut down? the entire gauge cluster begins flickering in and out of working including speed and tach and it flashes every warning light on said cluster and shows more in the screen between them these include lane keep assist malfunction attention assist malfunction critical error please see mercedes dealer immediately this weirdly however stops once we stop and sleep at a hotel overnight but it does happen every time we do long trips. unfortunately for me my dealer has been 0 help on these issues and have basically told me I was lying or exaggerating this issue even when I videoed the gauge when it happened they still had no clue. my bumper to bumper expires in January of next year and I'm out of options, please help.