Hello everyone! I have got the famous ECU failure problem on my Mercedes C200 -96. One day I was driving and suddenly the engine was only driven by 2 cylinders. I left the car to a car repair and they tried to change spark plugs and ignition coils but without success. I have read alot about this know and is about 95% sure that it is the ECU (PMS) now. Anyway I am looking for an ECU but that is not the problem I want to adress here first. When you change ECU you must make sure to test or even change the coil packs before inserting the new ECU or you take the risk of blowing that one up aswell. So, first I want to do here is take out the ignition coils and measure the resistances. I am pretty new to cars so I want to have so help on my mission here. I started of by removing the air inlet duct and then opening the top of the camshaft cover. Inside I found this (see attachment). So my first questions here are, I realise this is probably not the ignition coils as I hoped, they are probably located on the right side somewhere on the picture (can you perhaps further explain where)? What is it that I see? Is it only the spark plugs? Second when trying to remove the air inlet duct it still sticks to the cylinder block (see lower arrow in picture). Can I remove this with more force? I am really scared to do something dangerous so thats why I am asking. Also on the backside of the air inlet duct (see arrow also in picture) there is some electric cable, perhaps some air measuring transducer? Can I remove that aswell? I start with these questions now. Help appreciated.