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

SL/R129: G500 won't start

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Old 11-04-2017, 02:06 PM
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2002 G500, 1961 190b, 2001 SL500 Sport
G500 won't start

Hi guys, this is a G500 problem. I posted over there but there's so much more activity when it comes to repairs and electrical stuff over here that I'm asking here too. Since the motor is the same and maybe the computers, I think it's still relevant.

So a couple of weeks ago, my Gwagen wouldn't start on the first key turn. Now it won't start at all.

I put the key in, all of the dash lights come up. I go to start and it does nothing. I've tried both of my keys. I've put my battery charger on it in start mode and it doesn't help. I put a wire on the start solenoid and checked for voltage when I turned to start. No voltage when I turn the key. I put the wire to the battery post and it cranks over fine, BUT it won't start even when the ignition is on. Seems to be the key switch or some other computer is keeping it from turning on. What should I do next?

It's starting to snow. I need my wagen!

Thanks,
Mike
Old 11-10-2017, 12:34 PM
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2002 G500, 1961 190b, 2001 SL500 Sport
Ok so I tried to scan it with my code reader. It has a communication error and I don't believe it had that error before this started. I plugged the scanner into my C320 and it worked fine.
Old 11-20-2017, 08:12 PM
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2002 G500, 1961 190b, 2001 SL500 Sport
Dealer fixed it. Water was leaking thru a wiper post onto a relay that had corroded.
Old 11-20-2017, 11:40 PM
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1997 SL600, 2017 AMG GTS
I'm glad that we could help.

;-)

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