Q: Cylinder 4 misfire

Hello, This is not an uncommon issue. The jolting when changing gears most likely is an engine or transmission mount that is losing it's holding strength. With a failed mount, it will allow the engine and transmission to jolt when...

The alternator in your car charges your battery with the assistance from the voltage regulator which is something that regulates the amount of voltage being sent to the battery via the charging from the alternator (https://www.yourmechanic.com/services/alternator-replacement). It's function is to...

All Mercedes manuals recommend replacing the brake pads and rotors in sets. The rotors cannot be resurfaced due to material used in the rotors. The rotors are made of softer materials than most vehicles and wear more and should be...

It sounds like you may have experienced some internal transmission damage. This vehicle is a front wheel drive car so the transmission is in the front of the vehicle rather than under the front seat. Due to the placement of...

Hi there. This sounds like a case of a failed alternator & battery duet. Many times these can fail within close time frames of each other and are usually recommended to be replaced together so that it has a new...

Hi there. If when you remove the TPS (https://www.yourmechanic.com/services/throttle-position-sensor-replacement) (throttle position sensor) and the engine runs better, then there could be an issue with the MAP (manifold absolute pressure) sensor. Check the MAP sensor and see if the harness is...

Congratulations - way to take the initiative! It might be worthwhile to put a real oil pressure gauge in there to see what real operating oil pressure is. The "oil pressure light" trips on only about 5 psi of pressure...

Hi there. Generally speaking, when the heater is blowing cool air and the engine overheats, it's caused by the same thing - a clogged or damaged heater core. The coolant from the motor once hot circulates through the heater core...

Oil will not damage painted or finished surfaces or any metal surfaces such as that of the exhaust system. If left in contact for a long time, engine oil will contaminate, degrade, and damage the rubber components on the motor...