The sensor part for cars up to model year 805 are:
A000 822 33 06, 433 MHz parts (also on my W211, the US sensors are 315 MHz)
You would also need valves, there are different valve types depending on the wheel. I have A 001 401 27 13 valves but A 000 400 02 13 also exists (I understand that both actually fit on normal MB alloy wheels).
Edited: I see I was slow finding the valve parts. The link in post #2 also shows the valves but did not seem to mention the MB part number.