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SLK350

Hello, when one ignition coil fails it is generally recommended to replace all coils at the same time. When one coil starts to fail or fails it increases resistance in the whole ignition system. It is not uncommon for multiple...

You should not add any lead replacements in this engine since the pistons and valve train is designed to not use it or need it. Lead was used to cool and lubricate the valves in older engines from the 60...

Hi there. I am not sure what kind of vehicles you have owned in the past, but these are one of the most expensive vehicles to maintain. Compared to most American and Japanese cars, this Mercedes will cost about 2-3...

Several heater/AC components could cause this problem. A bad interior temperature sensor, a bad heater/AC control module, or a bad heater control valve (electrically controlled) may be allowing the hot water valve to stay open, circulating hot water when it's...

Have a mechanic check the code(s), then diagnose the vehicle based on that information. The problem setting the Check Engine Light may be doing other, unseen and expensive damage. A YourMechanic professional can help diagnose this issue by giving your...

If the vehicle is leaking brake fluid, I would stop driving it, and have it serviced as soon as possible as your braking system is essential to road safety. Braking systems operate using hydraulic pressure, so any leaks are a...

Hi there. Check the battery cables (https://www.yourmechanic.com/article/how-to-check-a-car-battery) for any corrosion. If there is corrosion, then clean the battery (https://www.yourmechanic.com/article/how-to-clean-battery-terminal-connections-on-a-car) posts with baking soda and water mixed. Then check the voltage on the battery. If the voltage is 12.6 to 12.4,...

Take it back to the dealer that did the oil change. There is likely still excess oil somewhere, or something was incorrectly re-assembled.

Hot engine coolant, possibly leaking in the passenger compartment via the heater core, or a heater control valve, may be the source of this unpleasant smell. It doesn't take much of a leak (a few drops will do) to create...

Hi. The belt tensioner pulley may need to be replaced if it is chirping. The chirping noise comes from the bearing inside the pulley that is worn out. It is typical for them to be replaced along with the serpentine...