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How to remove and clean the urea injection nozzle of a Mercedes GLC

Model: Mercedes Classe G W4631st - Years 1989-2018
Part: Checks and maintenance

In this video, we can see how to remove and clean the urea injection nozzle on a Mercedes GLC, which is showing an error message regarding AdBlue and displaying the remaining autonomy before the engine is blocked. The problem in this case, often, is that the urea spraying nozzle is clogged, and to solve the problem it must be cleaned. The best thing to do is to lift the car and remove the protection located underneath the vehicle, in order to reach the exhaust system. The video shows which screw to loosen to expose the nozzle, and we will see how encrusted it is. Simply soak it in very hot water, at least 80°C, and the crystallization will completely dissolve; but be careful, we must also remove the inner rim, with a very thin tip, in order to dissolve it completely; of course, the chamber must also be cleaned in the same way. Put everything back in place and now we can start again.

Posted on 4 August 2024 by ScegliAuto

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