I bought myself a Mercedes-Benz for four years and scrapped it at 6000KM. 4s shop responded to engine water intake. Why doesn't the owner refute it?
The seller should take the initiative to negotiate with the owner at the first time and take the initiative to assume the responsibility of maintaining the vehicle and the resulting economic losses; If the vehicle does not meet the maintenance standards, it shall be replaced with a new car or returned to the owner.
If the engine is only mixed with steam and water is fed from the air filter, there is no big problem at this time. We only need simple treatment to clean the water vapor in the air filter, throttle and cylinder. If there is a lot of water in the engine, but it does not affect the normal running, but the sound is loud, it may be that there is a small amount of water in the engine oil and gasoline, so it is necessary to change the engine oil and clean the engine related accessories.
If there is a lot of water, not a lot of mixed water, but the car does not start and the engine is not damaged, we need to drain the water, clean it up, and then reinstall and change the oil, but the circuit system is unsafe. Finally, there is too much water in the engine, and it can't run after starting. At this time, the cylinder, connecting rod and piston of the engine have been deformed, so it can be concluded that the engine has been scrapped, and only a new engine can be replaced or the car can be scrapped directly.
At the same time, engine maintenance is as troublesome as manufacturing. You can't put it back when you take it apart. If you put it back, the sound is loud and the power is low, or the engine life is short after overhaul. If you can't clone the serial number of the original car engine and delete the maintenance record, the car will depreciate directly and will be sold as a used car in the future.