M-Class (W163) Produced 1998-2005: ML 230, ML 320, ML 350, ML 400 CDI, ML 430, ML 500, ML 270 CDI

ML430 Wont Crank But Lights Work

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Old 04-15-2018, 08:16 AM
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Mercedes ML320 2001
ML430 Wont Crank But Lights Work

99 ML430

I was driving for a couple of hours yesterday and parked for 10 minutes. The car didn't want to Crank. The battery seems good since all the lights work.

Left it alone overnight, same result in the morning.

I tried to check the fuses. Even swapped K8 with fuses from K30 and K31. That didn't solve the problem. Also reset the FSS. Didn't help.

Any suggestions?

Last edited by neapolitan; 04-15-2018 at 08:41 AM.
Old 04-15-2018, 09:15 AM
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K8 is the starter relay and is a stand alone relay in the fuse box. Meaning it is the only relay like it and cannot be swapped with another in the fuse box.

Fuses 30 and 31 have nothing whatsoever to do with relay K8 and or starting the truck.

Please clarify your post.
Old 04-15-2018, 04:17 PM
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Mercedes ML320 2001
Ok. I have no idea what I'm doing. Just to be clear.

My car wont' crank. Won't start. I don't know what the next steps are at this point. Can someone help provide guidance?
Old 04-15-2018, 04:20 PM
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Mercedes ML320 2001
Should I go to AutoZone to purchase a new K8 starter relay?
Old 04-15-2018, 05:08 PM
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Turn the key to pos. #2. Do all the lights illuminate in the instrument cluster?

Disregard the above as you have already posted that info.

Last edited by Maj. Dundee; 04-15-2018 at 05:10 PM.
Old 04-15-2018, 05:20 PM
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2002 ML 320 & 2006 ML500










Remove the key from the ign.

Remove K8 relay and fashion a 6-8" piece of 12 gauge wire with spade terminals attached.

Insert one end of wire into slot 30 and insert the other end into slot 87. Note that both wire ends must make contact with silver dots, see sample photo.

If the eng. cranks, immediately remove the jumper wire.

If the eng. does not crank/turn over in all probability the ground strap at the starter is corroded or burned out.

Last edited by Maj. Dundee; 04-15-2018 at 05:33 PM.
Old 04-15-2018, 05:22 PM
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Stand by as all images did not post.
Old 04-15-2018, 05:25 PM
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Ok. Let me head over to AutoZone now to get the gauge wire. Will let you know asap.
Old 04-15-2018, 05:48 PM
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Part number

Do you have a part number for the wire gauge? I'm in auto zone
Old 04-15-2018, 05:59 PM
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Just ask for 12 gauge automotive wire and spade terminals.
Old 04-15-2018, 06:09 PM
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Mercedes ML320 2001


This is what they made for me.
​​​​​​
Old 04-15-2018, 06:14 PM
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Great.
Old 04-15-2018, 06:19 PM
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Mercedes ML320 2001


Trying now.
Old 04-15-2018, 06:21 PM
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Mercedes ML320 2001
Not working. Same state.
Old 04-15-2018, 06:22 PM
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Mercedes ML320 2001
Random pics






I have no idea where the starter is to check the ground strap. But I'll take some pictures.

Last edited by neapolitan; 04-15-2018 at 06:33 PM. Reason: Adding pics
Old 04-15-2018, 06:22 PM
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Are you sure you made proper contact with the silver dots?
Old 04-15-2018, 06:29 PM
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Connected

I thought I posted this picture. Sorry.
Old 04-15-2018, 06:35 PM
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Mercedes ML320 2001
Dots

Ok. Now I understand what you mean by silver dots. Let me try again.
Old 04-15-2018, 06:42 PM
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Mercedes ML320 2001
Not working still.
Old 04-15-2018, 06:50 PM
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Then there is a problem with a connection to the starter or the corroded/burned ground cable that was previously shown.
Old 04-15-2018, 06:58 PM
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And? I want to get to other things beside this problem.
Old 04-15-2018, 08:27 PM
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Mercedes ML320 2001
Old 04-15-2018, 08:28 PM
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Mercedes ML320 2001
Picture #1

Old 04-16-2018, 06:26 AM
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I don't know what picture #1 is supposed to mean but if you are looking for the location of the starter, it is on the passenger side below and to the rear of the alternator.
Old 04-16-2018, 02:03 PM
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Picture #1 was supposed to be a collection of pictures but they aren't uploading.

Will find the starter and try to post that.

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