What Causes Constant Idling at Low Speed in Mercedes-Benz?
1 Answers
Constant idling at low speed in Mercedes-Benz may be caused by issues such as the water pump impeller coming off the shaft, water pump damage, cooling system blockage, or faulty coolant temperature sensor. Below are the specific reasons: Carbon Buildup: There are multiple reasons for constant idling at low speed. Normally, fuel gas is injected into the combustion chamber and burns after the spark plug ignites it. However, due to carbon buildup in the combustion chamber, Uneven Combustion: The carbon buildup ignites the fuel gas before the spark plug fires, leading to uneven combustion. The resulting detonation force impacts in various directions, which is felt as engine vibration in the driver's cabin.