Rugging at X12XE

I know there are already some issues about this problem, but they do not help me any further. I hope there is someone here who still has an idea. Problem: 1 Idle with warm engine 2 The speed after starting (cold engine) slightly exceeds 2000 and remains there for about 30 sec. was replaced: Ignition unit LMM AGR Lambdasonde throttle valve was cleaned and the air collector and hoses also. (The small hose from the valve lid goes on a plastic stub that is to be installed?!) Motorle MKL does not shine! I hope someone can help me further, so slowly it becomes expensive to exchange things for good luck. I also don’t think of any more.