W124 400E Aux Fan And A/C Questions

[zeronero]

Hi all, I'm down in Los Angeles for the summer, and as usual 100+ degree temps are the norm resulting in my use of the a/c way more than usual. This has brought some things having to do with the a/c to my attention.

While driving on the freeway at high speeds the a/c works fine, but when I'm on the streets or stuck in traffic which is about 90% of the time the a/c blows only moderately cold air. At first I just thought that it was something directly apart of the a/c system that was doing this. Yesterday while on the freeway in traffic the compressor shut off, so 100+ degree air started pouring in. I checked under the hood to verify that it was off, and when attempting to use the HVAC controls to turn the compressor on and off the compressor stayed off. I had to restart the car for it to come back on. While reading some posts someone mentioned that it could be from the high and low pressure parts of the system having issues. Further reading seemed to suggest that the aux fans during low speed driving should always be on when the a/c is on, mine don't every come on unless the engine gets too hot, in high speed mode I believe.

From what I've read I've come to the conclusion that the reason for my a/c not blowing cold enough air at low speeds is that the aux fans aren't coming on, and the reason for the compressor shutting off is that it was the system protecting itself from maybe the high low pressure issue, something which probably has to do with the aux fans not working. Does that make sense or am I totally off?

Also, can the aux fans be modified to come on after the engine is shut off to cool the engine bay on hot days for 5 or 10 minutes? I noticed Hondas do that and it seems like it might help disperse the heat.