Why does the Mercedes-Benz C-Class turn off the engine when the coolant stops?
2 Answers
The reasons why the Mercedes-Benz C-Class turns off the engine when the coolant stops are as follows: Low engine temperature: Fuel is also difficult to volatilize and vaporize. If there is severe carbon buildup in areas such as the fuel system and intake tract, these carbon deposits will first absorb some fuel vapor. This can easily cause the mixture entering the cylinder for combustion to be too lean, leading to unstable idling or the engine stalling immediately after ignition. If you try to start the engine several times, the carbon deposits will absorb enough fuel vapor, and the mixture entering the cylinder for combustion will meet the standard, allowing the engine to start. Fuel pump malfunction: The fuel pump may suddenly get stuck or experience other faults, causing it to rotate insufficiently or stop, resulting in insufficient fuel supply and stalling. Low fuel system pressure, such as low fuel pump pressure, fuel line leaks, insufficient electrical current, or a damaged fuel pressure regulator, can also cause insufficient fuel supply. Clogged or leaking fuel injectors can lead to poor atomization, resulting in insufficient fuel supply and stalling.
My Mercedes-Benz C has recently been experiencing coolant issues after parking and shutting off the engine. I've noticed leaks or abnormal fluid level drops under the hood. When parking and turning off the engine, the cooling system pressure decreases, and if there are poor seals such as aging water pump or radiator connections, it can lead to leaks. The Mercedes-Benz C's cooling system is precisely designed but susceptible to high temperatures, often resulting in leaks. It's recommended to first check if the expansion tank's fluid level is within the normal range and visually inspect the chassis for any pink-green wet marks. Never underestimate this issue, as there's a high risk of engine overheating, which could damage the cylinders. I've dealt with a similar situation myself where the water pump seal was broken and needed replacement. Regular maintenance and checking the coolant can prevent most failures. It's best to quickly seek professional diagnosis at a specialized shop.
