I have a 1989 560SEL and the check engine light came on. It stays on all the time regardless of engine temperature. No other symptoms and all runs well. Any ideas? Thanks.

Check the oxygen sensor.

Thanks I'll check it and report back.

There is no check engine light in the 560SEL 1989. If so, where is it located?!!!

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380SE 1984 <------- Totaled by flipping accident
300SE 1988 <------- Sold
Volvo S70 2000 <---- 4 family
Opel Omega 2002 <-- 4 family
560SEC 1989 <------ Sold
560SEL 1990 <------ Sold
560SEL 1991 <------ 4 my mother
560SEL 1989 <------ Sold
600SEL 1992 <------ Current

http://search.ebay.com/_W0QQsassZkhazenzcc

It's on the instrument cluster. That row of warning/status lights. Turn key to position 2 and they all light.

What sort of mileage interval should we change these at?

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I'm not a doctor, but I'll have a look.

'85 300SD 245k
'87 300SDL 251k
'90 300SEL 326k

Six others from BMW, GM, and Ford.

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