valve

Hello looking for some help. The car seems run rough when at idle and wants to cut out and sometimes does, and gets worse when pressing accelerator, but once up at speed it's fine, could this be the OVP relay? (I have ordered one) however I was told it could be the idle control valve. However...

The heater in my 2012 W251 R350 blows nothing but unenthusiastic luke warm air at Maximum setting however the Aircon blows nice and cold. This is a recent change from previously working well in all states. From reading various posts I flushed the coolant system firstly to no avail and then...

I am still trying to troubleshoot my limp mode. I started by cleaning the EGR valve. When I took it off, I found a 5-7 sq.cm piece of black plastic which looked like it broke off something. I could not find it's origin, but I saw plenty of gunk in the manifold. Anyway, I started by cleaning the...