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Mercedes W126 common problems

Mercedes W126 common problems

Added on: July 3, 2023
Author: mj
  1.  What is Mercedes W126?
  2. Common problems and faults with the Mercedes W126
  3.  Mercedes W126 current value


What is Mercedes W126?

One topic that often comes up when discussing the Mercedes W126 is its common problems, despite being a beloved classic car among automotive enthusiasts.

Mercedes W126 refers to the Mercedes-Benz S-Class model produced from 1979 to 1991. It is the second generation of the S-Class luxury sedan and was known for its advanced technology, high-quality craftsmanship, and luxurious features. The W126 was available in various body styles, including a standard sedan, long-wheelbase sedan, and coupe. It introduced several innovative safety features, such as airbags, seatbelt pretensioners, and ABS brakes. The W126 is often regarded as a classic and iconic Mercedes-Benz model.

Mercedes W126

Common problems and faults with the Mercedes W126?

Here are some common problems and faults that are associated with the Mercedes W126:

  • Rust: The W126 is known to be susceptible to rust, particularly in areas such as the wheel arches, floor pans, and lower sections of the body. Regular inspection and maintenance, including rust protection measures, can help prevent or mitigate this issue.
  • Electrical Issues: Electrical problems can arise in the W126, including issues with the wiring harness, power window regulators, climate control systems, and instrument cluster. These can result in malfunctioning components or intermittent faults.
  • Air Suspension Problems: The W126 models equipped with air suspension (Self-Leveling Suspension or SLS) may experience issues with the suspension system, such as air leaks, failing suspension components, or improper leveling. Regular inspection and proper maintenance of the air suspension are important.
  • Engine and Transmission Problems: While the engines in the W126 are generally reliable, some models may experience issues with engine mounts, timing chain tensioners, or valve guide seals. Automatic transmissions in early models (pre-1986) can be prone to shifting problems or fluid leaks.
  • Fuel System Issues: Problems with the fuel system can occur, including fuel leaks, clogged fuel injectors, or faulty fuel pumps. Regular maintenance of the fuel system, including cleaning and inspection, is recommended.
  • Aging Components: As the W126 models are now considered classic cars, aging components such as rubber seals, gaskets, and suspension bushings may deteriorate over time. Replacing these components as part of regular maintenance can help prevent issues and maintain the vehicle’s performance.

It’s important to note that the presence of these problems can vary depending on the specific W126 model, its age, and its maintenance history. Regular servicing and addressing issues promptly can help keep the Mercedes W126 in good condition.

Mercedes W126

Mercedes W126 current value

The current value of a Mercedes W126 can vary significantly depending on factors such as the model year, condition, mileage, and location. However, as of my knowledge cutoff in September 2021, here is a general range of prices you can expect for a Mercedes W126:

In Europe, the prices for a Mercedes W126 typically range from approximately €5,000 to €30,000 or more. Older models or those in poorer condition may be found at the lower end of the price range, while well-maintained, low-mileage examples or rare variants can command higher prices.

It’s worth noting that these prices are approximate and can fluctuate based on market demand, availability, and specific features of the individual vehicle. If you’re interested in purchasing a Mercedes W126, it’s recommended to research current listings and consult with local sellers or automotive marketplaces for more accurate and up-to-date pricing information.


Are you already a proud owner of a Mercedes W126? If so, check out our selection of parts for this car at the following link:


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