2016 Mercedes-Benz AMG GT S Used Cars in Charlotte, NC 28212. Avg. Dealer Rating: (5 reviews) They have been so great, answered all of my questions and very patient with me when I wasn't immediately responsive due to illness. They worked everything out for an out-of-state sale.
By examining the spark plugâs insulator color, even a less-than-mechanically-inclined person can determine valuable information about the engineâs overall operating condition. Normal: Grey to Light Golden-Brown Color. This condition is ideal, the spark plug and engine air/fuel mixture are operating properly.
1 If you're having trouble locating the spark plugs, look for the black rubbery wires running around the engine. 2  Follow them to the end and you'll find the spark plugs. 3  Check your car's owner manual for the exact location of the spark plugs and the spark plug size you need. If you're having trouble locating the spark plugs, look for the black rubbery wires running around the engine. 2  Follow them to the end and you'll find the spark plugs. 3  Check your car's owner manual for the exact location of the spark plugs and the spark plug size you need.