The pressures in the manual and the fuel tank door are MINIMUMS anyway. You should add a few pounds under any conditions.

I have found 35 on the rear and 32 on the front works well on all my MB's.

As far as the Autobahn goes, on the open sections where there is no speed limit, around 100MPH is sort of standard cruise speed. Running around 160kph to 180 kph (100 to 115MPH) you will have some cars passing you. Occasionally you will have a really fastmover pass you.

Driving on the open sections of the German Autobahn is about as much fun as I can have with my clothes on. The downside is that eventually I have to come back here and drive with all the folks that have never been really taught how to drive on the Interstate. The people running the speed limit in the left lane DRIVE ME CRAZY!

Good luck,