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2014 GLK250 Smoke/Vapor under car

Old Jun 11, 2021 | 02:48 PM
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Misha_'s Avatar
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2012 GL350, 2014 GLK250
2014 GLK250 Smoke/Vapor under car

Hi Guys,

Wife's car sometimes smokes a little from underneath. It was first pointed out to me by someone that was driving behind me and pulled up at the light about a year ago. I have noticed it on a few occasions since then, but every time I pull over to try to track it down, it had stopped.
I finally caught it, here is a video of where it is coming from:

Does anyone recognize what that is? There is no smell to it, it seems like it is some kind of vapor rather than smoke. It also looks like some kind of a spring loaded contraption, so for a while after I caught it on video I did not think much of it - thought it was doing what it is supposed to relieving pressure or something? DEF fluid? A couple weeks ago, the car showed low coolant, so it got me wondering again. Coolant should not be going down there, right?

Anyway, any help or insight is appreciated!
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Old Jun 11, 2021 | 05:33 PM
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1922 Ford Model T / no OBD
Looks like DEF injector is having some leaks around.
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Old Jun 11, 2021 | 06:44 PM
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2012 GL350, 2014 GLK250
Originally Posted by kajtek1
Looks like DEF injector is having some leaks around.
DEF Injector! Roger, thanks man, I will begin looking at that =)
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Old Jun 13, 2021 | 10:05 AM
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glk
Originally Posted by Misha_
DEF Injector! Roger, thanks man, I will begin looking at that =)
is this covered by the new AEM warranty?
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Old Jun 13, 2021 | 02:10 PM
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2012 GL350, 2014 GLK250
Originally Posted by bugelrex
is this covered by the new AEM warranty?
That's the one MB extended because of the environmental fiasco? I do not know. I am in Canada, so I do not think it applies to me anyway.

But I will figure out if this part can be resealed, and maybe do a quick writeup if I can do it myself.
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Old Jun 13, 2021 | 02:16 PM
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1922 Ford Model T / no OBD
Canada doesn't fall under US settlement and in US those cars fall under EMC 9 modifications, who doesn't replace SCR system.
https://www.epa.gov/enforcement/daim...vil-settlement
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