I'm about to replace the spark plugs in my ML500 and the auto parts store sold me Bosch 6702 (FR 8 DPP30X) spark plugs. I took a look on Fastlane and the plugs they have listed are all Bosch 7422 variants.

I couldn't find out what, if anything, is the difference between them?

Anyone have any knowledge in this? and if I can use the 6702 plugs?

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1992 Mercedes-Benz 400E
2002 Mercedes-Benz ML500