Mercedes X Klasse Diesel Intake Manifold Issue

Sounds familiar I had a similar experience with my old BMW 3 series though it was petrol Jerking power loss rough idle the whole shebang The error codes led me to suspect a vacuum leak A leak in the air intake system after the mass airflow sensor MAF can cause the engine to run lean meaning too much air and not enough fuel This messes with the air-fuel ratio impacting engine performance and potentially causing stalling Have you checked for any hissing sounds around the car manifold or any obvious cracks or damage Even a small gasket leak can cause big problems

Thanks for the insight Vacuum leak makes sense I have not checked for hissing I was more focused on visual inspection I will try that When you say after the MAF sensor could you elaborate I am assuming that means any point between the sensor and the cylinders

Correct anything downstream of the MAF sensor The MAF sensor measures the amount of air entering the engine so if unmetered air gets in after that point through a vacuum leak a crack in the intake manifold or a bad gasket the engine control unit ECU gets incorrect information and cannot adjust the fuel mixture properly Given your symptoms and the error codes you are seeing I would say it is highly likely you have an intake manifold or gasket leak It is probably best to get it checked at a workshop Continuing to drive it with a lean condition could damage the catalytic converter or even cause engine damage in the long run

Thanks for the confirmation and the MAF sensor explanation that makes it clearer I took it to the shop Turns out the car manifold was defective leaking due to scorching like I suspected The total bill was 1180€ for a new manifold and fitting It runs great again Thanks again for the advice