CLA Maintenance / Care / Detailing
I am changing out my Spark Plugs on my 2014 CLA 250 4Matic. I purchased the plugs from the dealer (NGK 270 159 07 00). They come pre-gapped at 0.024. The ones I pulled out which are the original ones are gapped at 0.025. AllData says it should be set at 0.032.
Has anyone ever changed out...