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Mercedes Wiring Diagram – Free Resources

This page provides links tomercedes wiring circuit diagram free websites that contain Mercedes-Benz wiring diagrams and schematics. Bookmark this page as it contains invaluable resources. Our goal is to keep the resources on this page updated at all times. If you know of any website that we should add to this list, please send us an email. Note, that we do not endorse any of the following websites. You will be leaving the Mercedes Medic website and being taken to the resources page when clicking on these links.

BBB Motor

This is a complete database of Mercedes-Benz wiring diagrams. You will find wiring diagrams for almost all systems on your Mercedes-Benz including Body, Brakes, Driveline, Electrical Distribution, Engine, HVAC, Interior, Lighting, Restraints, Steering, Suspension, Transmission, and Warning Systems. This is one of the best resources as not only does it have Mercedes wiring diagrams for newer cars but it also covers Mercedes-Benz models such as E-Class, C-Class, CLS-Class, S-Class, ML-Class, GL-Class, etc.


This is a Russian website but all the electrical wiring diagrams are provided in English. You will be able to download a PDF file and save it on your computer. The electrical diagrams are mainly for older Mercedes-Benz models. Mercedes wiring diagrams for models up to 1997.

Mercedes Diagrams

Here you will find Mercedes parts diagrams. If you are trying to figure out a part number or where a part fits on your Mercedes-Benz then you may find this site helpful. Enter the Mercedes-Benz year and model to see all the diagrams and corresponding parts.

Digital Multimeter and Analyzers

digital air multimeter test shifter problems

If you need to do any kind of electrical troubleshooting not only do you need the circuit diagram but you will need a digital multimeter that can measure DC voltage, current and resistance. Digital multimeters are very affordable. There are several highly rated multimeters on Amazon’s Best Selling Multimeters and Analyzers.

The following video explains the basics of how to use a digital multimeter.




  1. Hi I have a Mercedes CLK 500 2006 year model I just bought wiring for the inside interior, the wiring is from a CLK 500 2009 year model I want to know what the difference is because now my mechanic says it doesn’t correspond..Please I need assistance urgently

  2. Hi I have a 1992 Mercedes Benz 300E 2.6 with the M103 Engine,I’m Having some trouble with the A/C. I do have a wiring Diagram ,however this one is not showing a connection between the Auxiliary Fan Relay and the MAS Relay.The reason why I need it is because the Diagram I have Shows me 5 wires comming out of the Auxiliary relay and checking it there are only 4 wires and the one missing is the one going to the MAS relay.So I hope you guys can help me.I thank you in Advance with any Info given,Thank you

  3. Hi
    I am looking for circuit diagram fo mercedes w210 e230 fuse 11 keep blowing checked blower and resistors fine its under rear seat

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