Q: How do I use the key button to lock the vehicle?

Hey there, thanks for writing in about your 2009 Mercedes-Benz E550. Be sure to verify that your car is not in "Limp Mode," as this will likely create the same reaction for your car. Mercedes uses this as a safety feature...

Hello. There are some common issues that can cause this to occur. Most of the time it is because the transfer case has an internal failure. The first thing that I would do is drain the fluid and inspect its...

Hi there. What you're describing is commonly associated with a broken ignition lock cylinder. The ignition lock assembly is a tumbler and key mechanism that is used to trigger power supply to auxiliary components and engage the starter motor to...

This may be a sign of a dirty or failing mass air flow sensor. The mass air flow sensor is a unit in the intake system that monitors air intake as it is mixed with fuel prior to being injected...

The traction control system monitors the steering stability of the vehicle and engages when loss of traction has been detected. This is done by the use of electronic sensors that communicate with the Power Train Control Module (PCM) regarding steering...

Hi there. What seemed to happen is that the spark plug well was full of engine oil and when you removed the spark plugs, the oil got into the cylinders. Now, if the rings were sealing very well, the oil...

The starter on your vehicle should be located on the transmission bellhousing, between the engine and radiator, on the lower side. From past experience, I can tell you that the starter arrangement on this vehicle can be difficult to get...

ABS refers to the Anti-lock Braking System. It is a computer controlled system that modulates the brake pressure to individual wheels if they are starting to lock up. The ABS controller is constantly monitoring the various sensors and devices in...