I had the call yesterday from Project AMG, car was in for an MOT but they didn't even bother as the rear subframe is toast - they've got contacts with MB Southampton & it was dropped off this morning to have it replaced FOC.
I hadn't even realised there was a subframe issue with the W212 until it was mentioned at my last service.
I'm having the brake-lines replaced as well as these were an advisory on last years MOT, Project AMG are sorting these - expecting it back in a week or so, in the meantime they've given me a Smart Forfour to use - slight difference in power I have to say.!!
Also having both front & rear nearside shocks replaced as these were both leaking - I've been warned these are expensive items
It's going to be a rather expensive bill, oh well, I've been lucky in the past 6 years so I can't complain, to be honest, as the car is still for sale I'm pleased it didn't sell to a forum member before the MOT as that would've been very bad karma.
Update you once it's back from MB.