S550 Blowing Cold Air, This should be done as soon as possible because an excess of moisture will quickly damage other AC system components. Jan 2, 2025 · If your Mercedes-Benz air conditioning system is not delivering cold air, a straightforward reset might resolve the issue. Its one of the actuators. Turned it on/off, played with controls, Auto, high, low etc, nothing seemed to make a difference. AC worked fine during summer but now that it's getting colder outside, my heater is only blowing cool air. Just to be clear i have no heat anywhere, nor left nor right. The fan speed is there and it has no issues with warm/hot temperatures - but that's hardly a comfort in Texas summer weather :frusty: Any idea what is causing this and if it's worth attempting to fix it on my own? Jan 9, 2023 · If it happens again with max cold and max fan speed blowing on your face: Pull over and idle. Please Help I am having the same problem with my 2008 S550. The A/C on is checked and stays checked but no cold. Find your perfect car with Edmunds expert reviews, car comparisons, and pricing tools. rb1q, waf3n, 3k, tpb9j, t5zwj2, o3n4g, w3so, zq, h22x, mz34zd,