2013 W166 - strong ammonia smell
Thread Starter
Junior Member
Joined: Nov 2008
Posts: 24
Likes: 1
W166 ML350 Blutech
2013 W166 - strong ammonia smell
I've searched all over this forum and others, but haven't been able to find a concreate answer.
I have a very strong ammonia smell coming from the car. I only notice it when the car is idle - such as parking the car in the garage, then exiting. It's blowing a thick white smoke from the driver side. The strong is overwhelming.
I've read Ad Blue Temp Sensor, Nox Sensors etc.
On a side note, I'm in Canada and received a voluntary warranty extension re: soot particulate sensor. Big words that mean nothing to me.
Does anyone know what's going on? Is the issue related to the voluntary warranty extension?
My SUV is a 2013 W166 Bluetec with 153,000 km.
I have a very strong ammonia smell coming from the car. I only notice it when the car is idle - such as parking the car in the garage, then exiting. It's blowing a thick white smoke from the driver side. The strong is overwhelming.
I've read Ad Blue Temp Sensor, Nox Sensors etc.
On a side note, I'm in Canada and received a voluntary warranty extension re: soot particulate sensor. Big words that mean nothing to me.
Does anyone know what's going on? Is the issue related to the voluntary warranty extension?
My SUV is a 2013 W166 Bluetec with 153,000 km.
Last edited by boomie; Nov 19, 2020 at 12:04 AM.
Out Of Control!!
Joined: Sep 2018
Posts: 14,666
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From: unbegrenzt
2017 GLE350 4MATIC
You are smelling DEF, which is urea diluted with water. Sounds like you are experiencing a problem with the DEF system. Did you scan for stored and active codes? Do you have any warning lights illuminated?
Junior Member
Joined: Aug 2019
Posts: 58
Likes: 6
From: Calgary, Canada
ML500, ML350 BT, GLE 400
Hey Boomie.
What part of Canada are you located in?
I've experienced the same issues last fall when the outside temperatures dropped down.
The heater went bad and I was losing DEF fluid, also my EGR valve got stuck.
Solved by deleting EGR, DEF, and swirl motors.
What part of Canada are you located in?
I've experienced the same issues last fall when the outside temperatures dropped down.
The heater went bad and I was losing DEF fluid, also my EGR valve got stuck.
Solved by deleting EGR, DEF, and swirl motors.
Last edited by Chamelleon; Nov 24, 2020 at 01:46 PM. Reason: Added more info
Thread Starter
Junior Member
Joined: Nov 2008
Posts: 24
Likes: 1
W166 ML350 Blutech
umm how do you delete EGR, DEF and swirl motors? Do I want to do this?
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Junior Member
Joined: Aug 2019
Posts: 58
Likes: 6
From: Calgary, Canada
ML500, ML350 BT, GLE 400
Yes, Boomie, delete Ad-blue and EGR. and maybe DPF as well depending (I did not delete mine because it wasn't clogged up) and you'll solve your issues.
I had this done one year already and everything works just fine, plus I did stage 2 tune up, and the car is flying.
I could live with all these ecological stuff, and to be honest, I was trying to fix the Adblue heater, however, when my car when in limp mode (which is ok for me to drive in order to get the car to the shop, the car won't accelerate and drive fast but I don't need it at that point) while I was driving 120 on a highway, moreover, in 5 mins of driving in a limp mode all the systems went down, I saw all the lights on the dashboard, the steering wheel went stiff, and the car shuts off in the middle of a highway!!!, I managed somehow to pull over to the right, scanned the codes and Ive got a few codes related to some ecological stuff (sorry, forgot the numbers). After this incident, I decided to delete everything.
I had this done one year already and everything works just fine, plus I did stage 2 tune up, and the car is flying.
I could live with all these ecological stuff, and to be honest, I was trying to fix the Adblue heater, however, when my car when in limp mode (which is ok for me to drive in order to get the car to the shop, the car won't accelerate and drive fast but I don't need it at that point) while I was driving 120 on a highway, moreover, in 5 mins of driving in a limp mode all the systems went down, I saw all the lights on the dashboard, the steering wheel went stiff, and the car shuts off in the middle of a highway!!!, I managed somehow to pull over to the right, scanned the codes and Ive got a few codes related to some ecological stuff (sorry, forgot the numbers). After this incident, I decided to delete everything.
