PeachParts Mercedes-Benz Forum - View Single Post - 240d rough idle but smooth when I slightly push on the accelerator

Diesel911 · #3 08-31-2016, 01:16 AM

There is a list of things the effect the idle smoothness.

Idle rpm too low.
Valves need adjustment.
Engine/Motor and transmission mounts need replacing.
Injectors need rebuilding.
Uneven compression.

Do or check what is cheapest or easiest to do first.