I replaced my shocks recently with Bilstein Heavy Duty on W201.
They are really rough compared to the oem (we have bad roads)
I think I may put Eibach springs to compliment them. I just want a modest drop. It feels like the springs are working much harder now.

I'm not sure what tropen is. I would ask a Bilstein tech directly about that. I don't have their number, but if you don't find it, let me know and I'll get it for you.