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Ask Chad Farhat Your Own Question
Chad Farhat
Chad Farhat, ASE Certified Technician A6 - Electrical / Electronic systems A7 Heating / Air conditioning systems
Category: Mercedes
Satisfied Customers: 1548
Experience:  Owner at Carolina Auto Service & Sales , 20 years experience in Foreign & Domestic vehicles
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I have 04 SL500. Suddenly won't start. Engine spins over

Customer Question

I have 04 SL500. Suddenly won't start. Engine spins over fine but won't fire up.
JA: Have you checked the battery, particularly the terminal connections? Are they corroded?
Customer: Battery(s) fine. Spins engine fast but start sequence times out without firing up engine
JA: Are you hoping to fix this yourself? What have you tried so far?
Customer: Havent tried anything yet. I open the hood and cant even see simple stuff like distribytor!
JA: Anything else you think the mechanic should know?
Customer: For whatever reason seems no spark to any plugs?
Submitted: 3 months ago.
Category: Mercedes
Expert:  Chad Farhat replied 3 months ago.

Hi, I'm Chad. Welcome to JustAnswer. I'm reviewing your question and I will be posting your reply ASAP.

Expert:  Chad Farhat replied 3 months ago.

we need a diagnostic scan with the a Mercedes Star system scanner or equivalent.

But most likely no spark on none , will be a Bad CKP ( Crank Shaft Position Sensor) ,THIS SENSOR SUPPLIES SPARK AND COMMON ABOUT GOING BAD

Can you have it scanned and retrieved and post the fault codes back here and I will be able to assist you more and be more accurate to what happened ..

Crankshaft Hall Sensor

Please let me know if you need anything else on it, just reply back and we will continue

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Chad Farhat

ASE Certified Technician