What items does Mercedes-Benz 40,000 km B maintenance include?

In the maintenance project of Mercedes-Benz E-Class car driving for 40,000 kilometers, in addition to the normal and regular oil change and three filters, it is suggested to clean the accelerator of the car and replace the spark plug and brake oil. The following is a detailed introduction about car maintenance: 1. Inspection of belt: When the car engine is started or the car is running, it is found that the belt has rings. There are two reasons: one is that the belt has not been adjusted for a long time, and it can be adjusted in time after it is found. Another reason is that the belt is aging and needs to be replaced with a new one. 2. Inspection of air filter: The air filter is too dirty or blocked, which will directly lead to the increase of engine fuel consumption and poor work. Check the air filter regularly every day. If there is less dust and the blockage is not serious, you can use high-pressure air to blow it clean from the inside out and continue to use it. Dirty air filters should be replaced in time. 3. Check the gasoline filter: If the oil supply is not smooth, check whether the gasoline filter is blocked in time, and replace it in time if it is blocked. 4. Engine coolant level check: After the engine is cooled, check whether the coolant level is between full level and low level. If not, please add distilled water, purified water or frozen liquid immediately, and the added liquid level should not exceed the full liquid level. If the coolant decreases rapidly in a short time, please check whether there is any leakage or go to a special automobile maintenance shop. 5. Inspection of tires: Tire pressure is directly related to the safety performance of tires. Too high or too low tire pressure will lead to bad consequences. The tire pressure should be lower when the temperature is high in summer and sufficient when the temperature is low in winter. Also, check whether there are any cracks in the tires, and replace the tires in time when there are potential safety hazards. When selecting a new tire, it should be consistent with the original tire model.