Ok thanks for reply.
IPACS Support Is it possible to solve the problem, maybe due to an other rendering or just painting it silver?
Another issue at the EC135:
The collective lever is not able to move fully down if you steer with the touch bar at the left side. You can only move it fully down by touching and moving it manually in the cockpit. Especially during decend or autorotation it would be great to use the full way of the collective control.