Problem Description and Possible Solution
A failed digital heater control valve can cause a lack of heat output from the climate control system.
Average mileage: 75,581 (9,375–126,500)
23 people reported this problem
The Heater Control Valve failed, stuck in the heat position.
Driver side SAM needed to be replaced because there was not enough current coming from the driver side of the car to start the AC Clutch.
The line that allows Freon to flow to the AC Compressor had collapsed.
I finally took the car to the dealer. Beyond a doubt Mercedes Benz installed a substandard AC/Heater System in my 2008 E350 4Matic.
When cutting on my heat inside the car,at a sudden point a noise comes from the car vent, sound it makes it sound like a cricket.
No heat is coming out of the HVAC system, water temperature gauge is indicating <50 degrees celsius, should be around 80+