What should I do if there's carbon buildup?

What should I do if the car won't start? It's urgent.

What should I do if I lose my car key?

Should I clean the carbon deposits in my Kia Sportage manual transmission after 90,000 kilometers?

What should I do if my car battery is dead?

No money to buy, what should I do?

What should I do if there's rust inside the wheel?

Is the inside of the V40 exhaust pipe black, like soot? Could it be too much carbon buildup?

What should I do if the seatbelt doesn't retract automatically?

What should I do if there's carbon buildup?

What should I do if there's a sudden power outage?