call anyway. someone else should be able to change things. i've had someone call the factory to add extras to an order that was already placed on a spec changable model, so cutting it REALLY fine. it can be done.
i think the 2nd facelift cars MY09 onwards had the Gen4. the differences are different front ends, wing mirrors, rear bumper and rear lights as well as a few interior changes.
the car just needs the same tyres on all 4 wheels, treads don't matter.
make sure the haldex has been serviced
here's my car with BBS Pescaras. i know they're not CHs, but they look basically the same.
i'm not really a fan of the CSs tbh. i think that Speedlines look better, and they're splits as well
best of luck with your decision.
yeah basically they turn the headlights to follow the road. my parents' Merc has them and they're brilliant.
congrats on the new car, but you should be expecting more like 250mi out of the tank, not 300mi lol.