Mercedes Benz GL (incl. GLS) Fault Codes
You can find common Mercedes Benz GL (incl. GLS) fault codes on this page that when clicked take you to a detailed description.
You can also type in the fault code you are getting below to find a more detailed description.
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Mercedes Benz GL (incl. GLS) Recall Notices
Common Mercedes Benz GL (incl. GLS) Codes
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Mercedes Benz GL (incl. GLS) Recalls
When a car manufacturer detects a problem with a model they put out a recall notice and more often than not offer to fix the problem free of charge.
You can check to see if your Mercedes Benz GL (incl. GLS) has any recall notices on our sister site AutoRecalls.co, sorted by model year.
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Common GL (incl. GLS) Fault Codes
These are the most common GL (incl. GLS) fault codes that people are searching for.
4/10
P0128
Coolant Thermostat (Coolant Temp Below Thermostat Regulating Temperature)
Learn More Fixes P1831
Transmission Transfer Case Counter Clockwise Shift Relay Coil Short Circuit To Ground
Learn More
8/10
P0106
Manifold Absolute Pressure/Barometric Pressure Circuit Range/Performance Problem
Learn More Fixes
- Manufacturer: Mercedes Benz
About the GL (incl. GLS)
The GL-Class first made its debut as a full-sized luxury SUV in 2006. There have been two further generations to hit the market since then, with the latest being released in 2020.
The three generations have been given the model designation of X164, X166, and X167 respectively. The model was renamed as the GLS when it received a facelift in 2016.
It sits above the Mercedes GLE, formerly known as the M-Class, in terms of sizing. This is a part of the GL-Class’ status as the flagship SUV model offered by Mercedes. Competition from outside of the company comes from rivals like the Audi Q7, BMW X5, and even the Land Rover Range Rover Sport.
The GL models are outfitted with a range of fairly high-performance modern engines. This does have its pros when it comes to performance, but also cons.
One of these cons happens to be fault code P0172 being the most commonly searched code for the model.
This code indicates that there is too much fuel in the air-fuel mixture. Unfortunately, the cause of the problem can be very hard to pinpoint, especially with such complex engines. However, owners have reported that poor maintenance can be one of the leading causes.
This can include issues like a faulty or dirty MAF sensor, as well as a faulty air filter. In some cases, defective fuel injectors can be the cause.
As if to illustrate how complex these engines can be, the second most common code is P0171, which represents that the engine is running too lean. Again, the code does not really help find the cause, but the MAF sensor is a good place to start again.
Both of these codes are limited to the first bank of the engine, which means GL models with V8s will only be affected on the one side, which can indicate it is not an upstream issue like the MAF sensor.
