JERKING!!!!! very annoying.
This is why my thoughts were lean fuel mixture causing surging. The transmission on our E500 is very solid,, that is unless the rad leaks.
The surge goes away when the engine warms up so I was thinking just lean mixture for emission controls.
I had this repaired by the dealer and they replaced the transmission control unit, under warranty. Somewhere in this thread is the service bulleten number and possibly a link.







