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I’m collecting information on this issue.
The car is not bothering me so much, however, the CEL is still on, and I’ve noticed an increase in diesel consumption and AdBlue consumption as well.
I went underneath the vehicle and I saw the following picture. Pls check the images.
BTW I’ve got the following codes: P20BA and P20E8
Last edited by Chamelleon; Mar 3, 2020 at 09:04 PM.
Reason: Errors
If you don't DIY, take the vehicle to a dealer or independent Mercedes repair shop.
If you are approaching the point where you are thinking of buying a new vehicle, I recommend doing that. Mercedes diesels of this era are fraught with expensive problems, unfortunately. Read this site thoroughly.
That hose is most likely leaking. I would clean it off somehow (pressure washer at car wash?) and clean and dry everything completely. Then run the truck a few mins and shut off. Repeat 3x then get under the truck and find the leak. I'm sure it is in that hose.
Or depending on parts cost, just replace that hose and see what happens. It is not the right way (throwing parts at the problem) but I can't see any other areas it would leak from, so it's a pretty good "educated guess"
I believe it is part #7 that looks like it is leaking on yours.. not sure exactly.
Go to mbpartsworld.com or a similar site (MB dealer parts catalogue) and look up your GL. That part is probably the same on all ML/GL but may have changed slightly over the years.
You may be able to get the part cheaper on eBay or even sometimes from a local dealer if you ask for a discount.
Hi Chamellon, Where is the corroded tube showing in the 3rd and 4th pictures you posted? Cannot figure the location out from the posts. Thanks for considering my question.
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