Might be a symptom of low freon levels. It is possible for a/c compressor interruption when the vehicle senses a load, i.e. acceleration, however you are suggesting it works when under load and not working during idle. It's pretty easy to check the freon levels so I would start there if I was you. The freon capacity is small with such a small engined vehicle as our smart 0.9L's are. I've seen the new 453 about 1/2 pound low of freon on a few occasions...My AC works good but stops cooling at low engine speeds. Compressor quits working. When engine rpms back up compressor works. Is this normal for the Smart.
I posted Freon pressure is good. Car is not running hot. Only has 11k on it. Been this way since new.Where do you live? I live south and this is common (Humidity) but if its shutting off all the way maybe check your coolant level. I know some cars will shut off if the car starts to over heat. I have a 2013 and it stays running but it obviously gets warmer when the car is stopped. I just had the condenser fan replace to.
It is under warranty, so possibly another local dealer? Something is wrong.Not being critical here folks but I have stated twice freon pressure is correct and two has said check freon pressure. I would like to know if other 453 owners are having the same results. Houston Mercedes says its fine.
I've been having a similar problem on my 2016. After running at highway speeds (50 mph -70 mph) and exiting the highway, my car will blow warm air when stopped at a traffic light or when parking. It will resume cooling after a minute at arterial road speeds (35 - 45 mph). Is this a coolant level problem?
Hi Glenn. Wanted to know what was the deal with this… I know this is an old post... but I’ve bought a 2016 smart and a similar thing is happening… AC works but after I am driving the car. I live in MIami and during the day we Are at 90º. My car is under warranty and I am going to take it to a MB service center next week. Any recommendations?My AC works good but stops cooling at low engine speeds. Compressor quits working. When engine rpms back up compressor works. Is this normal for the Smart.