I Googled lots, but could not find one simple answer. When did knock sensors debut in production vehicles? When did Benz adopt them? How about Ford? Anyone here know? Thanks!

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1991 560 SEL / 185k miles
1992 750il / 17k miles - project car

first knock sensors i saw in production was the 81 volvo 240 with chrysler ignition. i assume chrysler had it somewhere, don't know. mercedes got them with the 129s in 90 and the 119 engine. and so it goes, chuck.

Did a 91 M117 have them? I sorta figured my car had them. No?

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1991 560 SEL / 185k miles
1992 750il / 17k miles - project car

They were around on at least some mid 80's VWs.

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Prost!

Like noted above, started in 1990 on USA DOHC engines.

Never on M117 engine in the US.

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