Personally-

I'd just order the MB fluid. Tried the Febi fluid once and the pump was noisy cold- switched fluid back and everything was fine.

No need to do it running. You can fill on one side and let it run out the lower moving the steering wheel back and forth. Works on the older cars sure it works on the newer ones.

There's a filter in the bottom and you can change it. Unless the fluid is contaminated- is it red? or extremely dirty? I'd just suck out the resevoir fluid and replace the filter. Run the car and R&R the fluid again. Do it a few times and you've got a pretty good job of changing fluid.


M