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Ron, ASE Certified Technician
Category: Mercedes
Satisfied Customers: 35057
Experience:  ASE Certs.
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The blower motor isnt working, I opened it up and it seems

Customer Question

The blower motor isnt working, I opened it up and it seems as if its on low straight time. might it be the reglator under the blower motor?
JA: How many miles are on the car? Is it an automatic or a manual transmission?
Customer: 211000
JA: What is the model of your '209000 Mercedes?
Customer: auto
JA: Are you hoping to fix this yourself? What have you tried so far?
Customer: yes
JA: Anything else you think the mechanic should know?
Customer: 300 E
Submitted: 10 months ago.
Category: Mercedes
Expert:  Ron replied 10 months ago.

Hello and thank you for your question,

Can you tell me the year of your Mercedes 300E please?

Customer: replied 10 months ago.
Expert:  Ron replied 10 months ago.

The most common caused for the blower on your 300E to not operate is in most cases caused by a failing Blower Speed Control Unit with the blower being second most. Before you consider replacing any part you will need to to a bit of testing. I have enclosed the test steps in the link below .

See the wiring diagram as well for reference.

Customer: replied 10 months ago.
Success! It was the regulator just replaced it and it runs like a top.Thanks anyway, have a great day.
Expert:  Ron replied 10 months ago.

Your very welcome and thank you as well, that is the most common part to fail for sure.

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