W212 AMG Discuss the W212 AMG's such as the E63

Part Number Help

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Old Nov 30, 2024 | 01:47 PM
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2012 E63 AMG PP
Part Number Help

I have small coolant leak coming from this fitting pictures. The hose it connects to is a278 203 12 17. Could someone help me find the part number of the part pictured? Thank you.


I found it. 0099972972

Last edited by T_Cob; Nov 30, 2024 at 01:57 PM. Reason: Found the part
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Old Dec 1, 2024 | 08:19 AM
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What have you tried so far? Did you enter the hose part number on a site like https://mbparts.mbusa.com/
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Old Dec 1, 2024 | 08:23 AM
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2012 E63 AMG PP
Yeah, I put the hose number in Google and the other part showed up. I put the part number at the bottom of the first post.
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Old Dec 1, 2024 | 08:25 AM
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Could it be one of the parts here? If so, it is not available separately but is part of a hose assembly.

https://www.autohausaz.com/pn/MB-2782000900
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Old Dec 1, 2024 | 08:29 AM
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Originally Posted by T_Cob
Yeah, I put the hose number in Google and the other part showed up. I put the part number at the bottom of the first post.
Missed your edit.
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Old Dec 1, 2024 | 08:31 AM
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Since the hose and plug (0099972972) are part of the PCV system, I'd be concerned about the coolant leak coming from it. Could the coolant residue be from somewhere else?
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Old Dec 1, 2024 | 08:34 AM
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Make sure you find the o-ring from the old part.


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Old Dec 1, 2024 | 09:36 AM
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2012 E63 AMG PP
Originally Posted by JettaRed
Make sure you find the o-ring from the old part.
Funny you should say that. When I was trying to get the broken piece out, I accidentally pushed it in the block. Looking at some pictures of the timing chain cover, the broken piece doesn't have many places to go. This connection flows back to coolant reservoir so hopefully it will won't clog any passages.
Backside of timing cover, see the valve sticking up.
Backside of timing cover, see the valve sticking up.
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