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

2010 ML350 Alternator replacement

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Old Jan 28, 2019 | 02:51 PM
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2010 ML350
2010 ML350 Alternator replacement

My 2010 ML needs a new alternator, but I'm not trying to pay dealer prices. From what I can see looking at the way its mounted...it looks like it is only held in place by 4 bolts, the power post on the rear, and the little wiring clip and connector. The bolts don't look like standard sockets though. Does anybody know what type and size attachments are used on these mounting bolts? Almost looks like a star? Also, if anyone can link to, or post a pdf of the steps involved as well as tools required I would really appreciate it. I bought the part for under $200 and I want to attempt the installation on my own. Thanks!
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Old Jan 28, 2019 | 03:07 PM
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They are male Torx bolts.
Attached Files
File Type: pdf
R&I Alternator 272 & 3 Eng..pdf (101.0 KB, 903 views)

Last edited by Maj. Dundee; Jan 28, 2019 at 11:57 PM.
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Old Jan 28, 2019 | 03:17 PM
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2010 ML350
Thanks for that, but I was looking for the steps involved in removing the alternator itself...not taking it apart. I'm looking for how to release the belt tension, and also what size torx socket I need to pick up to loosen the 4 mounting bolts. The pdf that you posted looks more like how to take it apart once it is removed.
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Old Jan 28, 2019 | 11:58 PM
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Sorry for the mistake. Go to my original post for the correct PDF.
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Old Jan 29, 2019 | 07:36 AM
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Thank you! Exactly what I was looking for. I'm going to start tackling this later this morning after the kids are off to school.
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Old Aug 20, 2020 | 08:32 PM
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2005 Mercedes C230 Kompressor, 2008 GL 320 CDI, 2008 ML320 CDI, 2016 GLE 300d AMG Night Package
Originally Posted by Maj. Dundee
Sorry for the mistake. Go to my original post for the correct PDF.

Maj Dundee, can you please post the installation isntructions for my 2008 ML320 CDI? Or its the same procedure?

PS still working on the horns 🙂. Thank you sir
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Old Aug 21, 2020 | 05:36 AM
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Originally Posted by Dinismb
Maj Dundee, can you please post the installation isntructions for my 2008 ML320 CDI? Or its the same procedure?

PS still working on the horns 🙂. Thank you sir
For the alternator?
Attached Files
File Type: pdf
R&I Alternator 642 Eng. #1.pdf (118.1 KB, 384 views)
File Type: pdf
R&I Alternator 642 Eng. #2.pdf (84.8 KB, 276 views)
File Type: pdf
R&I Alternator 642 Eng. #3.pdf (90.7 KB, 266 views)
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Old Aug 21, 2020 | 09:30 AM
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2005 Mercedes C230 Kompressor, 2008 GL 320 CDI, 2008 ML320 CDI, 2016 GLE 300d AMG Night Package
Originally Posted by Maj. Dundee
For the alternator?
Yes and thank you Maj Dundee.
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Old Aug 21, 2020 | 12:13 PM
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Are you having a problem with the horns? If so describe the problem.
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Old Aug 21, 2020 | 12:24 PM
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2005 Mercedes C230 Kompressor, 2008 GL 320 CDI, 2008 ML320 CDI, 2016 GLE 300d AMG Night Package
Originally Posted by Maj. Dundee
Are you having a problem with the horns? If so describe the problem.
yes youre already helping me with that. I have yet to troubleshoot the next steps you suggested. I was going to continue working on the horns this week but the alternator gave out.

https://mbworld.org/forums/m-class-w...ml#post8117342


I got the alternator out already and waiting for UPS deliver the new one. It was a pita.




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Old Aug 21, 2020 | 12:33 PM
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Originally Posted by Dinismb
yes youre already helping me with that. I have yet to troubleshoot the next steps you suggested. I was going to continue working on the horns this week but the alternator gave out.

https://mbworld.org/forums/m-class-w...ml#post8117342


I got the alternator out already and waiting for UPS deliver the new one. It was a pita.


How did the alternator get the black coloration?
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Old Aug 21, 2020 | 12:41 PM
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2005 Mercedes C230 Kompressor, 2008 GL 320 CDI, 2008 ML320 CDI, 2016 GLE 300d AMG Night Package
Originally Posted by chassis
How did the alternator get the black coloration?
I dont know but the ML has 161k miles. On the GL died at about the same mileage 2 years ago.
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