BP5EFS or BP6EFS for slightly cooler plug (highway driving). Until recently, I heard that Fastlane Phil stocked them. That may no longer be the case. Also, the MB Classic Center in Irvine apparently stocks the correct NGK plugs, and I can still get the correct Bosch H9DC0 at my local MB dealer. HTH

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1988 California version 260E (W124)
Anthracite Grey/Palomino
Owned since new and still going strong and smooth
MBCA member

Past Mercedes-Benz:
1986 190E Baby Benz
1967 230 Inherited from mom when she downsized
1959 220S Introduced me to the joys of keepin' 'em goin'

There are only 10 kinds of people in the world--those who understand binary and those who don't