Hi! Commonly, a coolant leak on your particular vehicle will be from a thermostat, bad hose connection, or a cracked radiator. I suggest pressure testing the cooling system to help highlight the area that may be leaking. If a Check...
A differential can indeed fail without warning, but there are usually some ugly noises associated with it. As for your shifter, I believe your model still uses a lever connection between the shifter and the transmission. It should be easy...
Hi there. What happened is the fuel system got air in it causing a vapor lock on the injectors and the pump will not pick up the fuel due to the air bubble in the fuel system. First, make sure...
Hello. This problem may or may not be detected visually—excessive engine movement may be seen while idling—or by feel—engine movement can cause contact with the chassis or something else on the car, which one can feel. The motor mounts (https://www.yourmechanic.com/services/engine-mount-replacement)...
The vehicle will need to have a complete inspection (https://www.yourmechanic.com/services/75-point-safety-inspection) done to determine the mechanical and electrical condition. A complete fault survey should be done to see if there are any electro-mechanical issues both with the engine and/or transmission. Fluid...
Hi there, thanks for writing in about your 2001 Mercedes Benz ML430. This problem could be caused by a slipping belt (https://www.yourmechanic.com/services/drive-belt-tensioner-replacement) or a faulty belt tensioner (https://www.yourmechanic.com/services/drive-belt-tensioner-replacement). The power steering pulley needs to be observed while the car is...
There should be stored trouble codes that once downloaded will narrow the focus of the diagnostic. If you suspect that the accelerator pedal sensor (aka, "pedal value sensor") is faulty, that component has to be tested to rule it in...
Hi there. The fan clutch controls how quickly the cooling fan spins against the radiator. The hotter the engine gets, the more the fan has to spin. If the fan clutch is not functioning correctly, the fan won’t spin at...
Hello there, a variety of faults will cause your 1999 Mercedes ML430 to not shift out of first gear. The first step in any transmission or shifting issue is to check the transmission fluid level, condition, and color. After the...
Hello and thank you for your question. Check for the three essentials that the engine needs to run. Check for air in the engine and make sure that the air filter (https://www.yourmechanic.com/services/air-filter-replacement) is not plugged up. Check for spark to...
The ESP means there is a fault detected in the stability system. Wheel speed sensors (https://www.yourmechanic.com/services/wheel-speed-sensor-replacement) are a common cause of ESP issues and most likely will log a fault. The faults should be read out of the ESP module....
