I wouldn`t like to ask how much these parts were that you fitted and it is very difficult to determine what your problem is if no faults are showing up.I take it it has been on a proper Merc code reader and immobiliser problems have been ruled out,if that is the case then it may be worth having a look at your timing belt for any faults there,compression test may be worth getting done also,it may also be in your interest to join an owners club who are usually excellent at helping with difficult problems like yours
cdc, December 2012
