The 126a00 code indicates Your Mercedes is experiencing intake port shut off actuator issues. This is part of the system that allows air into the engine. You will need to have this fixed sooner rather than later. If You don't then You will find the car is running rich or lean, meaning the air to fuel mixture is not correct. This can make it harder for Your engine to work and will do damage to it over time. The cost of having this done is not extremely high, so it is best to not ignore the issue for longer than You have to.
Norman B
July 30, 2020
The 126a00 code indicates your Mercedes is experiencing intake port shut off actuator issues and you should seek diagnosis from a reliable auto repair shop.
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