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Mercedes-Benz S-Class W126 (1981-1991) Technical Articles

Welcome to our Mercedes-Benz Technical Articles section. We've gathered a vast collection of useful articles to help you perform many repairs and upgrades on your Mercedes-Benz. Save money by doing your own work and perform the repairs using the information we've provided here. Can't find what you're looking for? Try our Search Engine at the top of the page, or hop over to one of our Technical Bulletin Boards - focusing on repairs for all Mercedes-Benz! If you'd like to support the site and submit your own Technical Article, contact us here!

Looking for a different Mercedes-Benz?
R107 Technical Articles | R129 Technical Articles | R170 Technical Articles | W124 Technical Articles | W210 Technical Articles  | W211 Technical Articles | 190E Technical Articles | W203 Technical Articles
 Basics & Essentials
Changing Your Oil and Filter
The easiest and cheapest insurance you can buy for your Mercedes-Benz is frequent oil and filter changes. This article shows you just how easy it is.
Air Filter Replacement
Do you need to change your air filter but don't know where your air filter box is or how to do it? This article shows you the way with this article!
Replacing Your A/C Belt
Learn how to replace your A/C pump belt with this article.
Replacing the Air Pump Belt
New to working on your car? Not sure where the air pump belt is? Check out this simple article.
New Ignition Wires, Rotor and Distributor Cap
Here's some short instructions on this very basic of maintenance tasks.
Replacing Your Alternator
Replacing the alternator on the W126 can be a bit tedious due to the location and amount of room. This article goes over the steps involved with changing it.
Replacing Your Coil
This procedure is a bit difficult without the right knowledge and know-how, here's how to change the ignition coil yourself.
      
Common Engine Ground Strap Problems
This article covers the common pitfalls of the engine ground strap in your 380SEL.
    
Replacing Your Horns
Horns no longer working? Follow the steps outlined in this technical article to hear that glorious symphony roar once again!
      
Replacing your Top Dead Center Sensor
Replacing your TDC sensor is easy as 1-2-3 with the expertise documented in this technical article!
    
Replacing Your Distributor
This article shows you how to replace your ignition distributor with this technical article.
    
Replacing Your Auxiliary Fan
Changing the auxiliary fan is literally a snap with our handy replacement guide.
      
Installing a New Radiator
Radiator starting to give you issues? Before you knock it out, read this technical article and save yourself some aggravation
      
Installing a New Water Pump
Car starting to overheat? Heater not working like it used to? Over time, the water pump will eventually need to be changed. Here's how to swap it out on your 380SEL.
    
Installing a New Thermostat
The thermostat on the W126 can sometimes fail over time, causing some potentially dangerous overheating conditions. Here's how to replace it.
      
Removing Your Fan
Here is the fan removal procedure for those of you with a W126.
    
A/C Condensor Replacement
Here is the A/C condensor replacement procedure for those of you with a W126.
    
Replacing Your Oil Pump
Replacing your oil pump can seem daunting, but this article will help you overcome that fear and replace that pump.
    
Swapping Out Your Oil Pressure Sender
Is your oil pressure reading no long accurate? Follow the steps outlined in this article to replace that sender.
    
Installing a New Power Steering Pump
Over time, the power steering pump in your W126 tends to fail. This article will go over the steps involved with replacing this pesky pump.
    
Replacing Your Purge Valve
Learn how to replace your purge valve today with this quick n' easy technical article.
    
Replacing Your Vibration Damper
Follow this tech article to replace your vibration damper.
    
Got more questions? Join us in our Mercedes-Benz Technical Forum Message Boards, and ask a question to one of our many automotive experts.
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