hi. anyone have a guide on how to deflate the rear self leveling suspension before removing the bags on a 211 estate with the star diagnostic system? can not seem to find it.

Use the simulation program before running the actual program to familiarize yourself with the process. If you don't have the simulation program, just use the star diagnostic system; it will step you through the process.

Basically the process (at least for my W211) is:
-Jackstands
-Remove wheels
-Connect star, step into the airmatic suspension section (SAS?)
-Use DAS to reduce air bag pressure to ~3 bar. Loosen air lines onT-block at rear of car. Use DAS to complete releasing air bag pressure to atmosphere.
-Install new bags.
-Tighten the air lines on the T-block.
- Inflate according to instructions in star.

Is there any way of releasing the pressure on the rear Airmatic bags on my E55 without needing Star?

Sure ... disconnect an air line at the bag ... slowly

of course you will have removed the pump fuse