What is the situation that Passat can't start because the instrument light doesn't light up due to air leakage in the heater box?

Hello, for professional problems such as motor vehicle fault code or some special fault maintenance, I suggest you consult 4S after-sales professional technicians, who have the fault code parameter comparison questionnaire issued by professional manufacturers. By this comparison, you will know the cause of the problem and the repair method. Including the price of motor vehicle maintenance parts, you can also consult. 4S has the most professional technicians, and the most transparent fees are generally posted on the wall. If my answer is helpful to you, please set it as the best answer.