Q: Unable to lock hatchback door

The shifter knob shift mechanism (https://www.yourmechanic.com/services/shifter-interlock-solenoid-replacement) may be loosing contact and needs to be replaced. The switch will need to be tested and monitored using the Mercedes scanner. If the switch gives erratic readings when scanned and while the switch...

Hello. Exhaust systems can make a variety of sounds that we would not intuitively expect. When I was first learning about exhaust systems I was surprised to find out how dynamic they can be. I am assuming you are speaking...

Hello - you have at least one cooling system problem (https://www.yourmechanic.com/question/my-car-says-it-s-over-heating-by-colton) that could be causing all of the symptoms, or more than one problem. The cooling system was not properly bled, and still big air pockets. This will cause overheating...

Hi there. Are there any warning lights illuminated? You mentioned having the codes checked, what were the codes? The codes are not a diagnosis, they simply lead the technician to the system or direction of diagnosis. Does it idle rough...

The oil specifications show synthetic oil in one of these weights 0w30, 5w30, 0w40, 5w40. The oil change interval is every 5,000 miles.

Hello, thank you for writing in. The vehicle may be having issues with the throttle or its position sensor, the MAP senor, the mass airflow sensor, or the idle air control valve. With that being said, you can remove the...

The horn button contacts are worn and the horn button and clock spring needs replaced. When replacing the horn button and clock spring, clean all of the contacts in the steering wheel to ensure that the horn button will make...

Hello - check first for problem codes, whether your Check Engine light is on or not. Most auto parts stores will do this for free on a "time-available" basis. If the misfire is still ignition-related, check plug wires, especially the...

Hi there. Unfortunately, since this is an aftermarket upgrade and not an OEM system, we really can't help diagnosis this issue. You might want to contact the manufacturer of the alarm / auto start system to seek their advice in...