If your early door lock actuators do not have any cracks in the rubber diaphragms, but they just won't hold vacuum - it may be possible to fix them by taking them apart and cleaning and resealing the outer lip of each diaphragm. This is not guaranteed, as there may be other problems with the actuator, but we have found that approximately 80 percent of those crack free actuators can be restored using Kent's kit and method of restoration. This video will cover the step-by-step process (when using his kit) of how to take them apart, clean them, reseal the rubber lips and retest when completed. This video is included free with the purchase of the kit (see related products below). This video DOES NOT COVER removing the door panel and removing the actuator from the door. (For additonal help please see related products).
Get it for Free! This is available as a free add-on item. Review the product details for bundle options.
Product Details
Video Preview:
If you discover that the diaphragm(s) is cracked or torn then you will need to replace those affected rubber parts. We do offer a kit with new diaphrams that also comes with installation instructions. A hand vacuum pump tester is required to test any repaired or restored actuator before reinstalling it in the door.
How to view this on-demand video:
Once you complete the purchase of this video you will be able to view it immediately when you are logged in and on your personal account page (click on My Account). The video(s) will show up under My Video Manuals. The video is NOT downloadable to your computer or mobile device, but you will be able to view it anytime, from anywhere and from any device as long as you have internet access and you are logged in to your account at mercedessource.com.
Important note: This video manual may or may not include all the information you will need to troubleshoot and/or repair your specific problem/s. Please read the full description carefully to determine if this video is applicable to your year and model and contains the information you are looking for. If not, please refer back to our "Solutions Finder" and enter your chassis number and the specific problem you are having to see if we offer a solution.
Related Products:
Service: Vacuum Hand Pump Testing Kit w/ Extras
1973 to 1980 Vacuum Door Lock Actuator Diaphragm Repair Kit
Here is a great way to save some money repairing your old Mercedes vacuum door lock actuators. When they go bad it is almost always due to cracks in the rubber diaphragms. These can be easily replaced once you remove your door panels and remove the units.
1973 to 1980 Vacuum Door Lock Actuator Rubber Diaphragm Replacement Instructions by Kent Bergsma - Download
These five page step-by-step illustrated instructions will walk you through the correct procedure of removing your old worn and cracked door lock rubber diaphragms from the actuator housing and replacing them with new ones. These are procedural instructions only.
1973 to 1980 Vacuum Door Lock Actuator Single Rubber Diaphragm
If you need more than one just change the quantity in your shopping cart. If you would like to order the kit look below.
Diesel 616 617 Vacuum Source Troubleshooting and Repair - by Kent Bergsma
Applies to 240D 300D 300CD 300TD 300SD Diesel This guide is written specifically for owners of 123 and 126 diesels from 1977 up to 1984. There are some sections that apply to the 115 and 116 chassis but it is not specific to those models.
615 616 617 Diesel Healthy Vacuum Exam Kit
Is your diesel suffering from hard brakes, poor or no engine shut off, climate control problems, or even funky transmission shifting??