How to solve the problem of Mercedes Benz engine yellow light on?

The yellow light on a Mercedes Benz engine may be caused by various reasons:

Poor fuel quality: The fuel quality is poor and requires refueling at a regular station.

Carbon deposits: Carbon deposits on throttle valves, spark plugs, fuel injectors, and intake ducts.

Sensor malfunction: such as a water temperature sensor malfunction, causing the engine to be unable to sense the water temperature.

There are two situations when the yellow light is on:

Yellow symbol light: The engine has a malfunction but it does not affect normal operation, but it needs to be inspected and repaired.

Red symbol light: If the engine has a serious malfunction, it should generally be reported for repair immediately. In special road conditions, emergency driving is allowed, but attention should be paid to the engine status.

If the problem is not solved after the light is turned on, it may cause problems such as poor exhaust, increased fuel consumption, worsening engine wear, oil burning, and increased noise.

Solution for the yellow light on the Mercedes Benz C260 engine:

Pull over to the side, turn off the engine for 5-10 minutes, press the start button or turn the key to the ON position without applying the brake, power on for self inspection, and check the fault light condition after 5-10 seconds.

If other lights are constantly on, go to the 4S store or repair shop to inspect the corresponding modules and components; If only the engine malfunction light is on, ignite it again and see if it goes out.

If it goes off, there is nothing wrong. If it still lights up, it is necessary to check the engine related components and modules.

If the engine fault light of a Mercedes Benz car is yellow, with fault codes P054A-P054C, it is a camshaft adjustment wheel fault, and there is a fault in the intake cam 1 and 2 columns.