M-Class (W164) Produced 2006-2011: ML280CDI, ML320CDI, ML420CDI, ML350, ML500, ML550

Ml500 w164 won’t start

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Old Feb 25, 2018 | 07:58 AM
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2008 ML500 W164 won’t start

Hi guys this is my first post and hoping someone may have some ideas on my issue
08 ml500 for last few weeks the car has taken a while to start and a bit slow in cranking as if it was a dying battery , today it just won’t start at all not even a tick tick as you’d expect from a flat battery .
Ignition turms on , all accessories seem to be wrking but it won’t crank over nothing at all
Tried to jump it with a jump pack and also with another vehicle and jumper leads but still nothing.

Any ideas i’m stumped

Last edited by Stealth ML500; Feb 26, 2018 at 12:54 AM. Reason: Forgot the year
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Old Feb 25, 2018 | 12:42 PM
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What is the battery voltage using a DVOM at the charging points?
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Old Feb 25, 2018 | 11:00 PM
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Battery is fine all electronics working
I’m thinking possibly a starter motor issue or crank sensor
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Old Feb 25, 2018 | 11:44 PM
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Not the CKP sensor. If the battery voltage is over 12v, then it is probably the starter.
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Old Feb 25, 2018 | 11:53 PM
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Thanks that’s what im thinking
I just went to see a European specialist mechanic and he tried telling me it’s going to be the auxiliary battery and located under the hood on a 08 ml500 I tried explaining as far as I know it’s only a backup for the auto trans and he couldn’t even tell me the correct positioning of that battery.
So is there a way to test the starter and should I attempt to replace it myself.
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Old Feb 26, 2018 | 12:40 AM
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It's going to be a very difficult task to test the starter, let alone replace it. The exhaust system must be removed.
Attached Files
File Type: pdf
R&I Starter ML500.PDF (130.4 KB, 205 views)
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Old Feb 26, 2018 | 12:45 AM
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Nothing is easy on this bloody car
I’ve replace front right strut twice , front air compressor , rear tailgate motor , Sam module , the list goes on and it’s only done 95,000 kms

thanks for the pdf & your help.
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Old Feb 26, 2018 | 12:49 AM
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Could you please add the year of the ML to your profile.

The ML gas series is the most inexpensive, compared to any diesel, which repairs are in the thousands.
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Old Feb 26, 2018 | 12:55 AM
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2008
tried changing it not sure if it has I’m still trying to wrk out the site.
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Old Feb 26, 2018 | 01:03 AM
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Old Feb 26, 2018 | 03:00 AM
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Done thanks
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Old Feb 26, 2018 | 08:55 AM
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Originally Posted by Stealth ML500
Done thanks
No it's not done. You are still missing the year and where you live. I provided the steps and you still can't do it.
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Old Feb 26, 2018 | 09:02 AM
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