For most 123 chassis cars made from 1977 to 1985 and all 116 chassis sedans built from 1973 to 1980 with the Behr Heater motor. This repair guide will take you through the process of how to properly remove your heater blower motor and replace the motors two brushes. This is the most common reason for failure.
If your blower motor has been intermittent or some days it wont come on until you drive for a while your motor brushes are most likely at the end of their life. This is something you may just want to replace as a preventative measure. 20 year heater motor brushes are very prone to failing at any time. If it has not failed yet it most likely will sometime soon.
If your car has a over 150,000 miles on it or you know the heater motor has been run a lot, the best time to do this job is now! Do not wait for it to quit on you on a cold winter morning.
PLEASE NOTE: These brushes will not work on a Seimens motor. Remove your motor to determind which one you have. You will see Behr written on the plastic housing.
New motors are no longer available for the W123 chassis. If yours can not be repaired you will need to find a good used one. We may or may not have one is stock. They sell as quickly as we get them. Use the search box to check.
How to view this on-demand Manual:
Once you complete the purchase of this manual you will be able to download it immediately when you are logged in and on your personal account page (click on My Account). The PDFs will show up under My PDF Manuals. You will be allowed three downloads, so please save the file on your machine for backup.
Important note: This PDF may or may not contain all the information you will need to solve your specific problem. Please read the description carefully and make certain it applies to your particular Mercedes. If you are not certain please contact us first. Due to the nature PDF download manuals or instructions we can not issue a refund if you purchase in error or assume it contains information it does not. Please keep in mind that no follow-up technical support is implied or offered after purchase.