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We recently bought a 2010 ML350 Bluetec with about 130k miles on it. It had tons of regular maintenance as a corporate vehicle including replacing the oil cooler twice.
Unfortunately it also has a leak from the Urea tank.
Does anybody know common areas where they leak? Or if o rings are available?
So far all I'm finding are threads about failing heaters.
I just went through air spring repairs on two different cars that were the rescue of leaking o rings, not the actual air springs. And Id rather try replacing a few o rings rather than a $1000 tank. Yes I'm frugal, but more so I hate replacing perfectly good parts.
Here's what ours looked like after a recent 3 hour drive. Thankfully around town it's not so bad.
8
Ouch. With such visible signs you should not have a problem to pinpoint the leak.
Just check it after shorter drive, not when everything is soaked.
Good technique is also wrap suspicious parts with paper towels.
I've decided to go for the DEF/EGR/DPF delete. At 20k miles, I've already had to replace the DEF tank heater, thankfully under warranty.
Warranty's over in October, doing the delete thing shortly thereafter.
Just to follow up, I dropped the tank and found that the heater or pump was replaced previously and they forgot an o-ring. I bought one from the hardware store and replaced it and the leak is fixed!
Im pretty sure it was a professional shop that last touched it. Oh well, a couple hours and 40 cents solved it.
07-14-2018, 02:04 AM
