BenzWorld Senior Member
Date registered: Aug 2013
Vehicle: 2003 SL55; 2011 E350 BTC
Location: Battle Ground, WA
Mentioned: 4 Post(s)
Quoted: 69 Post(s)
I had the same problem with my SL55 and thought it was bushings or alignment or something. Definitely not normal feel. I’ve checked all those and nothing out the ordinary was found.
More I drove it, it appeared to be the traction control and accelerometers reacting to losing traction on one rear tire.
Control system then tapped the brake on that slipping tire, which causes the opposite tire to slip, repeating the process and getting pretty wild. This was on Mich PSS tires with stock suspension.
I hesitate to turn off the traction control, as things could get sideways fast, but that is an option to test. Don’t do this unless skilled.
My tires are now new (Conti Sport Contact 5P), which helps, and I also added rear camber links to reduce negative camber (now -1degree), which also helps, but the feel of happy tail wagging still comes and goes when I accelerate hard. Not as bad, but you can feel it still.
Not sure I solved it, but better grip seems to cure the issue. Try raising the car to highest setting, which flattens the camber, or lowering tire pressure for better bite. Let us know what happens.
'11 E350 Bluetec P2 Sport 55K Mi.
'03 SL55 AMG Pano 95K Mi.