Fan would not go on for Heat/Air, so I purchased a Blower resistor off of eBay in anticipation of needing a new one. Replaced resistor and no change. I ran a test on the 3 prong connector and power to the connector, and progressively higher volts from center white as I turned the fan speed control up. With the new resistor, there were 12.4 V going to the motor at all fan speed levels. Hooked up old resistor and volts were progressively higher as fan speed was turned up. I then took out the blower motor and bench tested. Rust on both ends of the shaft. Nothing at first, but after WD 40 got minimum amount of fan turning. Reinstalled with new resistor and nothing. Put old resistor back on and it worked, but even at high fan did not move much air. It looks like the new resistor is defective and I will return it, and I need a new fan motor. What does the braintrust on the Forum think?
Ebay has a new one for $99.
HVAC Blower Motor 4 Seasons 75897 | eBay
Is this a Mercedes part and what is the Mercedes part number?
Thanks,
Pete Jones
Manassas, Virginia
2007 Roadster with 76,300 miles. 6 speed manual