Hi, i have problem with my Mercedes Benz w211 error code p1999 fan make noise and load on over, and on odometer say coolant vast workshop, and the other problem the aromatic on front not up ant i check the fuse and really its good but the button isn't come read light when i push it, please help

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Airmatic could be due to an issue with the valve block or the air compressor.

The fan staying on all the time is because the module that controls the fan is not working. P1999 is just a generic code. You need to scan the car with a Mercedes scanner.

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