Major AC issues with my new 240d :(

[1981_300sd]

Ok so today was way hot outside and got to try out the air conditioning in my new 240d. I was excited because I thought everything would go well - well I was very disapointed.

There is a toggle switch that was mounted under the dash of the car. Didnt know what it was for. I had my ac on in the car and it was getting up to 110 degrees C - I pulled over and checked things out - it turns out someone mounted that toggle swich to control the aux fan! So every time I want to cool down the car I have to use the stupid toggle swich.

Second issue - the car runs great at idle, but when the AC is on, it struggles VERY hard to the point where it almost dies. Is there something that is supposed to kick in and turn up the idle when AC is on or could it be a failing compressor dragging it down?

So basically, I would really appreciate it if someone could tell me -

1. Where do I connect the AUX fan to let the car manage its operation rather than me using a toggle switch?

2. What could be causing the car to almost die at idle when AC is on?

Thanks once again all.