If you suspect that your upper control arm is not bad, it's best to get a second opinion to be sure. When I diagnose vehicles, I am sure to explain my findings to the customer and let them know what...
Hello, thanks for writing in. If the engine is only stalling when coming to a stop, then it may be a defective crankshaft sensor that was installed or commonly this is caused by a dirty or failing throttle body. I...
Hi there. Assuming this is a standard type ignition switch, with the description of events you provided. I am concerned that the tumblers in the lock cylinder may have been damaged, when the half key was turned. The key turning...
Replacing the reservoir and hoses since they are cracked is the first step. The second step is to figure out why the coolant is creating too much pressure in the tank. This may be caused by a variety of reasons...
Hello. If you are losing oil, it is either leaking or being burned. The causes of burning oil would be faulty piston rings that allow the oil to blow by into the combustion chamber or bad valve guide seals that...
Hello. When this occurs all of a sudden I would usually start by checking the transmission control module for codes. This would let me know if there are any foreseen electrical issues. If there are no codes then the fluid...
The most likely issue in this situation is with the EGR valve. Problems with the EGR system can lead to misfires. The exact problem with the EGR will need to be diagnosed with some further testing. The EGR valve itself...
The bulbs are xenon type bulbs and they will fade away before they burn out. My suggestion would be to replace both headlight bulbs. This way you do not change one and the other burns out in a few weeks....
Hi there. The P0400 EGR (exhaust gas recirculation) valve code may not be a valve not working. This code description is a EGR flow malfunction. The fact that your vehicle has multiple cylinder misfires leads me to believe the valve...
Hi there. If you're having problems with the steering wheel and ignition cylinder being locked and the vehicle is having issues starting, the problem may be with the ignition lock cylinder. Sometimes the components inside the ignition lock cylinder can...
Hello. When an issue like this turns up with this many codes I usually start by checking the fuel pressure. If the fuel pump is failing and not creating the right pressure then you will get multiple misfires. If the...
Lack of power and shaking can be caused by a number of components. Misfiring can reduce power and cause shakes. Misfires can be ignition related like from bad spark plugs or ignition coils. Also from sensors such as the crankshaft...
Typically a throttle position sensor (TPS) is tested using a multimeter. The specs to compare against are published in the Factory Service Manual. As long as the TPS tests within the range of published values, and does not display intermittent...
Mercedes stopped including dipsticks on their cars when they switched to electronically controlled transmissions. One of the reasons was to discourage the owners from doing just what you are trying to do. The transmission fluid is unique, and adding dexron...
I'll agree with the shop on this one. The yaw sensor is a very sensitive device designed to measure the sideways force on a car during a turn and it's part of the Vehicle Stabilization System. It has a small...
Your check engine light may come on for many different reasons such as a faulty mass air flow sensor, a faulty O2 sensor, a bad catalytic converter, bad spark plugs or wires and many other reasons. Unfortunately due to the...
Hi there. After having the EGR (engine gas recirculation) valve replaced, the vacuum lines replaced, and the tubes cleaned out, then there could be an electrical issue with the EGR system. Check the EGR harness with a digital meter and...
Hi there: To be completely honest, there could be multiple issues with your 2008 Mercedes-Benz that are causing the symptoms you're describing, ranging from something simple like a crankshaft position sensor to the throttle position sensor or complex issues with...
Hi and thanks for contacting Your Mechanic. Since the problem started when you had replaced the battery, check the wires to the battery and make sure that they are not corroded. Also, check the battery cables for they are on...
