Presence of a TSB (supposed) indicates Mercedes has a solution and you can get proper plugs or plug/wire combinations at your dealer.

It's patently ridiculous to think anything else.

And, I'd be surprised if Mercedes' solution doesn't include Bosch plugs.

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Kent Christensen
Albuquerque
'07 GL320CDI, '10 CL550. '01 Porsche Boxster
Two BMW motorcycles