If you need a body shop head to Uni-Body Collision in Mississauga, right near Dixie / 401 (Pearson Airport). Their website is www.unibodycollision.ca
They are BMW specialists, along with Audi, VW, Porsche and Mercedes. They've always done top quality body work for me and my friends who I've referred many times.
It's a no-bull**** shop, they tell it like it is and they are really honest with what needs to be done for a proper job, and they have a lifetime warranty on their work.
It's a brand new shop, nicest body shop I've ever seen. I've always dealt with the manager, Rich (he's a great guy who goes out of his way to help) and I believe they are long time partners with Techmax.