I don't believe Mercedes ever made A/C specific carpeting. That doesn't make sense from an inventory standpoint. In the US, and probably Canada, the dealers installed the A/C units. Therefore, there are slight differences between how the blowers were mounted and how the drain hoses were run. In my car, there is just enough room that the carpet can be slid up behind the blower. The mounting does not interfere. So without looking at your installation, it may be hard to suggest how to go about it. However, the supports are for when the car is bouncing down the road. Disconnecting any mounting bracket long enough to install the rug shouldn't be a problem.