Use MB power steering fluid or fluids marked for power steering.
Use 40 or 50 weight Mobil 1 engine oils. The 30 weights are no longer true synthetics (base 3 instead of base 4).
I use Mobil 1 ATF and differential lube in my '91 300E simply because you never know what a dealer or Indy is using. They don't always use MB ATF fluid. A lot of them use bulk fluids.