I'd give the dealer one chance to get it right...then I'd call Mercedes' 800 number and complain. Of course, I'd let the dealer know that was my plan...

Sorry to hear of your troubles...been there, and been annoyed too!

__________________
"If God had meant for us to walk, why did he give us feet that fit car pedals?" Sir Sterling Moss

Michael
2014 E63S Estate
2006 SLK55
1995 E500
1986 Porsche 944 turbo