Shawn - there are 3 speed limit configurations on the 550i:
1) 200kmh - Stock 550i
2) 250kmh - 550i M-Sport
3) Unlimited - 550i Dinan
It is possible Wert_02 is the M-Sport setting and not the unlimited setting. I am curious whether MJGood has a Dinan or just an M-Sport. Mine is M-Sport and Dinan.
If Wert_02 raises the limit to 250, then it would suggest that maybe Dinan is delimiting the car somewhere else or perhaps their software overrides the car's software.
2014 Porsche 911 Turbo S
2015 Mercedes C300 4MATIC