Mercedes-Benz has selected NGK spark plugs has the original equipment supplier for its four-cylinder petrol engines. M274 engines and M270 transverse engines all now leave the production line fitted with NGK plugs.

The 1.6-litre engine uses NGK’s SILZKFR8B7S (originally used in the AMG M133 engine) while the 2.0-litre versions are fitted with SILZKFR8C7S. Tim Ward, Deputy General Manager, Sales & Marketing, NGK Spark Plugs Ltd, said, “As a company we have enjoyed a long and successful relationship with Mercedes-Benz and are delighted that our spark plugs are to be used in all its four-cylinder petrol engines.”  He added, “Mercedes is one of the world’s premium vehicle manufacturers and the fact that we have been selected as sole supplier is tribute to the work that our original equipment team does to satisfy their exacting requirements.”

Both spark plugs are M12 types with a long insulator design. In contrast to spark plugs with an SAE terminal, they come with an insulator lengthened by several millimetres and a cup-shaped terminal. This design prevents flashovers and electrical failures even if extreme ignition voltages are applied.