Mercedes Benz

Technical Service Bulletin # 120105 Date: 101201 Ignition Sys - Iridium Spark Plug Info/Application Chart SI B12 01 05 Engine Electrical System December 2010 Technical Service This Service Information bulletin supersedes SI B12 01 05 dated April 2010. [NEW] designates changes to this revision SUBJECT High Performance Iridium Spark Plug/Spark Plug Application Chart MODEL E90, E91, E92, E93, E60, E61 with N51, N52, N52K engine 2010 BMW 328i Sedan (E90) L6-3.0L (N51)   38 SITUATION High Performance Iridium Spark Plugs, also referred to as High Power Iridium Spark Plugs, were introduced staring with the 2006 model year and later in E90 and E60 vehicles with the N52 engine. High Performance Iridium Spark Plugs incorporate an iridium center electrode (0.6 mm thick), one ground electrode, and a redesigned insulator. The new spark plug technology allows for increased service life, improved cold start performance/combustion characteristics, and a consistent operation...