Because maybe someone else has the problem.In the Forumstopic Oil pressure 7 bar? I had reported on my cold start problems. The oil pressure was rather a 'side-war scene'.
In the morning, I had only been able to move the car with considerable effort after a few minutes of attempts to jump in. Then when he had run and got warm, he jumped in without any problems.
This cold start problem was definitely the temperature generator for the Motronic! The stupid thing about it was that the seat of the two temperature probes is swapped in the case of 100 S4 (C4) compared to V8. The V8 is the one for the Motronic rear (in the range of ignition distributors). The same encoder is installed at the front (right below the idle control valve). If you only know V8, you won't get so easy on it...
First I drove completely without the dealer (plug removed from the sensor for a few days) and the problem had already improved, the car jumped better even in cold condition.
After I have installed and connected a new encoder (part number 035 919 369 M) (in case of battery disconnected so that the fault memory is emptied) everything works as it should. Even in the morning in cold condition, the engine jumps immediately with the first key rotation.
Also for a motor replacement, which can be more often with our old babies with ABH engine, this is not completely unimportant with the swapped installed temperature sensors between ABH V8 and ABH C4...
For example, if you are a child. buys a used S4 engine for its V8 or vice versa.