226-278-157 spark plug indexing PDF

A document that provides technical instructions and diagrams on spark plug indexing for Mercedes-Benz direct injection engines. The content emphasizes the importance of using the correct spark plug specifications, including electrode positioning and torque requirements, to prevent misfires and damage. Incorrect spark plug usage can lead to severe engine damage, illustrated through comparative images of approved and unapproved plugs. Detailed visual comparisons highlight the differences in thread length and heat range specifications.