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2006 CLS 500
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2006 CLS 500 74k miles

Cheaped out the other day and put mid-grade, never done this before but I read where others have not had problems with it.
Check engine light comes on in the next 10 miles. I figure it's the fuel so I get some octane booster and fill up with premium.
Check engine light stays on, I figure it'll take a few miles to correct itself

Go out to dinner, everything is great (besides the annoying light). Come out of the restaurant, no start....
Take an uber home and come back the next day ready to set up a tow....car starts, light is still on.

I stop at the nearest part house and they tell me I have a Crankshaft position sensor malfunction, Sensor A.

Advice, please?
Mihai Flueras is online now
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