I took my vehicle in for an engine light, ended up being a sensor they did not have in stock. Since I live 3 1/2 hours from the dealer, I left my vehicle. It was there about 5 days. My car had an upgraded premium audio. When I picked it up it sounded horrible, I later contacted them regarding this. Drove the 3 1/2 hours back, made several requests to have the panels removed to verify the system had not been tampered with, but my requests were refused. Instead, I was told it was my iPhone making it sound bad. And, their way of assuring me the speakers were original was to take the vehicle to another area, away from me, and run a sound check.
This place needs to be thoroughly investigated by Mercedes, media, authorities, and federal agencies. Their scam needs to be exposed. They need to be charged and held liable. And, their victims need proper justice. Un-fric’n-believable!!!