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Take it into the shop. It's a whole lot easier.
385 euros @ mercedes main dealer.
http://202tech.mkosonen.com/howto/blower.html detailed and illustrated how to with no need to visit MB stealership
have you checked the fuse if so then you will need to replace the resistor for the blower hig and low dettings have you checked the fuse do you have 12 volts to blower if so then you will need to replace the resistor for the blower replace the blower motor
how do you change heater blower resister merc a class
-yes-if it work on hi only, check blower resistor-did you check the fuses-hit the blower with a hammer and see it that gets it going. if so, replace-has the blower been noisy lately? if so, replace-what kind of car is this? edsel? corvair? skyline?
Continental/VDO New A/C Heater Blower Motor PM4820
Remove the wiring harness to the heater blower fan. Remove the retaining bolts. Remove the fan from the blower. Reverse the process to install the new heater blower fan.
it is right under the glove compartment
either the water pump went out or the blower itself did. you have to pull the dash out to replace it. it's really not the most difficult thing to do so don't get discouraged
replace heater relay and or heater blower motor
Replace it. This is probably a sign of badly worn bearings that make it difficult for the motor to spin.