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Auto Talk => The Garage => Topic started by: Submariner on June 06, 2019, 02:34:53 PM

Title: Friends gasser Mercedes GL sounds...interesting.
Post by: Submariner on June 06, 2019, 02:34:53 PM
https://vimeo.com/340749548

Long story short: this is a 2016 GL450 with the 3.0TT V6.  It has about 36,000 miles on it.  The exhaust sounded like this after about an hour of around town driving. 

Any ideas?
Title: Re: Friends gasser Mercedes GL sounds...interesting.
Post by: BimmerM3 on June 06, 2019, 02:38:33 PM
Quote from: Submariner on June 06, 2019, 02:34:53 PM
https://vimeo.com/340749548

Long story short: this is a 2016 GL450 with the 3.0TT V6.  It has about 36,000 miles on it.  The exhaust sounded like this after about an hour of around town driving. 

Any ideas?

I'm not getting any audio.
Title: Re: Friends gasser Mercedes GL sounds...interesting.
Post by: FoMoJo on June 06, 2019, 02:43:06 PM
Muffler shot?
Title: Re: Friends gasser Mercedes GL sounds...interesting.
Post by: Submariner on June 06, 2019, 02:48:41 PM
Quote from: BimmerM3 on June 06, 2019, 02:38:33 PM
I'm not getting any audio.

I tried it on my iPhone and laptop.  It's working for me.
Title: Re: Friends gasser Mercedes GL sounds...interesting.
Post by: shp4man on June 06, 2019, 03:21:33 PM
Possibly bad catalytic converter. Possibly covered under emissions warranty.
But it's hard to be accurate at diagnosis over the phone.  :huh: Check engine light on?
Title: Re: Friends gasser Mercedes GL sounds...interesting.
Post by: Submariner on June 06, 2019, 03:34:14 PM
Quote from: shp4man on June 06, 2019, 03:21:33 PM
Possibly bad catalytic converter. Possibly covered under emissions warranty.
But it's hard to be accurate at diagnosis over the phone.  :huh: Check engine light on?

No...no indications besides the noise.  He says it's driving normally today.
Title: Re: Friends gasser Mercedes GL sounds...interesting.
Post by: Soup DeVille on June 06, 2019, 04:13:36 PM
It sounds kinda like a loose heat shield, which is super common on some vehicles.
Title: Re: Friends gasser Mercedes GL sounds...interesting.
Post by: BimmerM3 on June 06, 2019, 04:22:03 PM
Quote from: Submariner on June 06, 2019, 02:48:41 PM
I tried it on my iPhone and laptop.  It's working for me.

Weird. It works on my Macbook, but not my Windows 10 desktop (and I double checked that audio from other sites was working).
Title: Re: Friends gasser Mercedes GL sounds...interesting.
Post by: Submariner on June 06, 2019, 05:18:34 PM
I should mention that about a week ago, he complained of a strong, rich exhaust smell during startup.  Not sure if that is coincidence or not...
Title: Re: Friends gasser Mercedes GL sounds...interesting.
Post by: Eye of the Tiger on June 06, 2019, 05:24:31 PM
Quote from: Submariner on June 06, 2019, 05:18:34 PM
I should mention that about a week ago, he complained of a strong, rich exhaust smell during startup.  Not sure if that is coincidence or not...

That's probably normal
Title: Re: Friends gasser Mercedes GL sounds...interesting.
Post by: Submariner on June 06, 2019, 08:27:15 PM
Quote from: Eye of the Tiger on June 06, 2019, 05:24:31 PM
That's probably normal

I just smelled it...it's like straight gasoline.
Title: Re: Friends gasser Mercedes GL sounds...interesting.
Post by: shp4man on June 06, 2019, 08:32:26 PM
Sounding more like a bad cat. Raw gas destroys cats, so something like a leaking injector or a misfire can do damage. The "honeycomb" inside the cat breaks up and starts rattling around.
It could also be a heat shield and a cold engine.   ;)
Title: Re: Friends gasser Mercedes GL sounds...interesting.
Post by: Submariner on June 06, 2019, 08:41:21 PM
Quote from: shp4man on June 06, 2019, 08:32:26 PM
Sounding more like a bad cat. Raw gas destroys cats, so something like a leaking injector or a misfire can do damage. The "honeycomb" inside the cat breaks up and starts rattling around.
It could also be a heat shield and a cold engine.   ;)

Could be the heat shield...same thing happened on my dads G500, though it sounded vastly different and was persistent for the entire time the engine was on.

I don't think the engine was cold, though, for the gas smell or the diesel rattling.