Yesterday I finally got the right oil delivered and so it was time to replace the transmission fluid. Which was remarkable easy.

• get the car somewhat level
• unscrew the filling bolt
• put a oil pan below the drain bol
• unscrew the drain bolt
• drain it
• make coffee
• screw in the drain bolt
• find handpump and pump the oil in till it overflows
• replace the handpump after 2 quarts, with a new pump because it broke
• screw in the fill plug
• tighten it all to specs (25-28 foot pound)
• cleanup any oil spills and the bell housing with ester based cleaners
• drive around and be happy how simple it shifts now

the only issue I encountered is that I only managed to put about 4.5 quarts of oil in and not 5.1 or so as it was called for. I think I need to drive it a bit and than fill it up at a spot where the car is perfectly level.

Now I just have to learn which O2 sensor is broken and replace this on. And to replace/relocate the knock sensor. It's going to be fun...