Mercedes S Klasse fresh air blower issue

Sounds familiar I had a similar problem with my old Volvo V70 The symptoms were identical no air flow, error code pointing to the blower Before you jump to replacing the blower motor, have you checked the electrical wiring leading to the motor A loose connection or corroded wire can cause the same issue Also, is your air conditioning system working otherwise Does the compressor kick on Sometimes a fault in the HVAC system can shut down the blower as a safety measure You mentioned an error code – can you share the specific code That might give us a better clue Have you checked the blower motor resistor That's another common culprit These cars often have a blower motor resistor that controls the fan speed If that resistor fails, the blower might stop working altogether It is usually located near the blower motor itself

Thanks for the detailed response I haven't checked the wiring extensively, just a quick visual inspection The AC seems to be working, compressor engages I'll have to get the exact error code later Where exactly would I find the blower motor resistor on the S Klasse

Okay, compressor engaging is a good sign Regarding the blower motor resistor location on your S Klasse, I'm not intimately familiar with that specific model, but generally, it's in the HVAC system housing near the blower motor itself Sometimes it's accessible from under the glove box, or you might need to remove some trim panels A quick search online for "Mercedes S Klasse blower motor resistor location" should yield some diagrams or videos Honestly, given the mileage and the error code, it does sound like the blower motor itself is the most likely cause I'd suggest getting a professional diagnosis It might save you some time and potential headaches Plus, they can properly test the wiring and resistor before condemning the motor If it is the motor, 365€ sounds like a reasonable repair cost if that includes labor

Thanks again for the help I took it to the workshop, and you were right, the blower motor was indeed defective They replaced it for 365€ Everything is working fine now