FAQs—Mercedes Benz C350
I just discovered that the cooling fan of my Mercedes Benz C350 keeps running even after I turn off my car. Why is this happening?
It is actually normal for the cooling fan to keep running for several minutes right after you turn off your Mercedes Benz C350. This especially happens after you drive on a hot day when the engine doesn't usually cool off easily. However, if it still hasn't shut off after 20 to 30 minutes, then there might be a problem. Check the temperature-sending unit or the sensors themselves. The most common problem with temperature sensors is they usually get dislodged and disconnected because of the engine's vibration. If the sensor is dislodged, then reconnecting it can fix the problem.
The gas gauge of my Mercedes Benz C350 is giving an inaccurate reading, and I keep running out of gas because of it. How do I fix it?
If your Mercedes Benz's fuel gauge does not change or behaves erratically, it could be because of a number of things. Inspect the temperature and oil pressure gauges to see if they are also affected, and if they are, then there's a problem with the instrument voltage regulator. Check the voltage output of the regulator with a voltmeter, and see if it reads within its specified measurements, around 5 volts. If it's not, then it might have a weak ground connection or the resistor wire that supplies its voltage might be open. However, if only your car's fuel gauge is acting up, then the problem may be the component itself, the sending unit, or the wiring in between.
The engine of my Mercedes Benz C350 won't turn over when I try to start my car. What could be the problem?
There are many reasons why your Mercedes Benz C350 won't start. You need to observe your car further in order to zero in on the cause. If your vehicle is silent when you turn the key in the ignition, then the battery terminal cable connections might be corroded. You can confirm this by forcing the point of a screwdriver or an insulated handle between the connector and the terminal post and twist it firmly. After that, start the engine again, and if it works, then you need to clean or replace the cables. If your car is making a clicking noise but won't start, then it usually means the battery is dead. If not, then the wiring to and from the starter must be loose. Lastly, if your car doesn't start only on rainy days, then the distributor cap might be damp. Evaporate the dampness by cleaning it with a solvent.
The blower motor of my Mercedes Benz C350 will not come on to blow the heat out. What could be causing this?
It most likely is an electrical problem. The first thing you should do is to check the fuse and replace the burnt ones that you find. This is a common issue because of the continuously fluctuating power flowing through the circuits. By replacing the blown fuses with new ones, the blower motor and other problem components you might have should start working. If that doesn't help, verify good power and grounds at the blower meter, or check for power coming out of the resistor.