Spark Plug Indexing PDF

A technical documentation detailing spark plug indexing for Mercedes-Benz direct injection engines. It emphasizes the importance of adhering to specific installation requirements for spark plugs, including using a special type and ensuring correct torque to prevent engine damage. Visual comparisons between approved Mercedes-Benz spark plugs and non-approved NGK plugs illustrate the importance of indexing and torque specifications. Incorrect installation is shown to potentially cause significant engine damage, such as melted pistons.