[everettpa1]

My 06 E350 4Matic makes a grinding sound when revved to 1000RPM when rolling slow, like in a parking garage. It was real noticeable on a hill when I was driving real slow and started to accelerate. At speed the tranny is smooth. When cold it is a little jerky at slow speeds. Anyone else have this issue? Its going to the dealer tomorrow.

 

[BenzE500]

Thats probably the best bet, I could speculate but it wouldnt do any good.

 

[lear31a driver]

All Benz 03-06 are "jerky" when cold, the computer is manipulating the valve body to get the engine warm faster, and keep the car from cold lurches.

The grinding sound at 1000rpm may be clutch (not traditional, fluid type) slippage, the 4matic is problematic with this issue. There may be no fix, the dealer may have better news.

 

[everettpa1]

You may be right because the dealer said its fine. He said its hunting for a gear and all I need to do is push it past the 1000RPM line. Great idea until you consider I'm in a parking garage!!! He explained the new 7 speed is hunting ... and I said its a five speed right? Scary.

 

[Andrew2004az]

Could it be the brakes??? I remember reading about SBC it has a hill assist that applies the brakes if it detects the car moving back. I have the same thing happen but it goes away after I am on a level surface.

aww after a quick search here you go it explains SBC

http://www.whnet.com/4x4/sbc.html