For a while now I have had an intermittent warm rough Idle on my 1987 - 300SE. This occurs once the engine is warm - usually when slowing to a stop( or when stopped ) when the RPM's drop low - Below 500.
I know many elements could be the source of and contribute to such a disposition.
HOWEVER, when I replaced the OVP today , the new one seemed to immediately control the rough Idle. I have a feeling it is doing just that - controlling, rather than eliminating.
I can kind of hear the engine (103) wanting to go to "rough " again and not being permitted too.
Does this narrow a possible cause (for an irritating rough Idle) for anyone ?

Thanks.

PS. Also, could anyone help please wth my post of 9/5/01 Re -Sliding SunRoof -W126....