I need to access the unit which allows fresh or recirculated air into the cockpit of my 99 SLK 230. The unit seems to be stuck in the recirculate position so when it is really cold outside the insides of the windows fog up from breath and I do not wish to stop breathing. I took down the panel which hides the HVAC filter and it is now clear that the glove box must also come down. My problem is that it looks like the right side of the dash, which contains a vent, is also part of the glove box surround and I am not sure how much of the dash I need to remove to gain access the fresh/recirculate air assembly which is directly forward of the glove box surround. Anyone done this? All help is greatly appreciated.