Changing Spark Plugs on M119
Car:1999 S420 48,000 MILES, time to change sparks
Alright, I got the air filter housing off and now I see two black covers on each valve cover with funky screws. I need directions on how to remove the cover and how to change the spark plugs. By the way, I've never changed spark plugs before. I'll be buying the sparks from Fastlane. Do I have to gap the spark plugs? The 99 S420, is a distributorless ignition.