Having another issue I forgot about lol. While ticking over in park, I get a drop in the revs then it comes back up again. Any help would be much appreciated.
E55K SL500 E250X2 Smart44 Brabus Track car E450Cabriolet X350 Pick up
This is called hunting. Any sort of intake air leak can cause this. There are many items that can cause an air leak. Get it plugged in first and check some of the live data. You may find a component is failing too.
Solved !!! Found a breather pipe from the manifold to the air intake was broken away and gone soft. Replaced it and now car is sweet as a nut. Happy days. Thanks for the advice guys.