SL-Class (R129) 1990-2002: SL 280, SL 300, SL 320, SL 500, SL 600, SL 60 AMG

SL/R129: engine spins but won't fire up

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Old 11-22-2012, 10:56 AM
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1990 sl500 mercedes benz
engine spins but won't fire up

I have 1990 sl500 I recently bought 3-weeks ago that won't start. I check the spark plugs and tried to see if there is spark came out when I crank the engine but, there's no spark coming out. I tried to replace the camshaft and crankshaft sensor but, still there's no sign of spark on the plugs.

Please, help!
Old 11-23-2012, 06:59 AM
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1995 SL320
Car won't start

Do a Voltage loss test on your battery..if there is a voltage loss..then go thru and clean the contacts on the battery, Starter, Alternator and the Ground Strap from the engine to the chassis. Then try and start the car.
Old 11-24-2012, 11:18 PM
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1990 sl500 mercedes benz
Hi!
I had tried the cleaning all the contacts starting from the battery positive and negative poles, all the engine and body grounds, but still it cranks but, it won't fire up. Thanks, afrts, for your
concern. I really appreciate it. I still digging deeper to these mazed.
Old 11-26-2012, 04:10 PM
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1995 SL320
What kind of voltage are you getting at the Crank Sensor while turning over your engine..?

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