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Q: Crank Shaft Sensor on 2001 Mercedes-Benz SLK320

Rookie cbe0621eac06868b3efe0d8d1d3611e23c60d3114864ea2ec19a68cfbd3eebab
Car will just shut off.... just replaced crank shaft positioner... ran fine first day... Tryed to start car next day - nothing - all lights on dash come on and the electric fan motor starts to run in the engine compartment - that it! Waited an hour - went out and car started right up ?!?!!?? What is causing this to happen ?
No car image 94a1663db56199c5353592009e34aaa51078a2469bed068bb8d6f0ba43accf97
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you are describing two very different problems. engine just
shutting off MIGHT be a crank sensor; you confirm that with
either a diagnostic code or watching the resistance of a
suspected sensor while heating it with a heat gun. the MB
cranks sensors usually will fail when hot. when you have a
bad crank sensor, the engine will turn over, crank and crank and crank, but will not start until it cools off. this sensor won't cause the dash lights or aux fan or a "no crank" problem. you will need someone with MB software to confirm you are getting a start signal from the
DAS and then make sure that you don't simply have a dead spot on the starter.
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