Short and anticipate this thing works very well in my case.
My pros and cons in some detail:
+ Steering wheel remote control works as it should
+ Installation easy
--- The very high price (One should decide for themselves whether they want as much "only" spend because of the steering wheel remote control)
(- No switching back the titles possible - I write in brackets because the also did not support the Originalfernbedieunung with the Original Radio)
All in all, unfortunately very expensive. Because you deserve nothing else ;-)