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GLS Class (X166) Produced from 2016 to 2019

I did it - 2017 Unicorn (M276 with Offroad Pkg) purchased

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Old Jan 7, 2025 | 11:46 AM
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From: Denver
2017 GLS 450
Cool I did it - 2017 Unicorn (M276 with Offroad Pkg) purchased
The searching was... painful to say the least, but I got one.
It will become my new adventure rig for the Colorado mountains (based in Denver). When it gets here it needs 3 things;
  1. It has some sort of small leak at the transfer case. It's going straight to a shop to have that identified and remedied.
  2. Both diff fluids will be changed
  3. Winter tires. I've been following some other threads on this. I am not interested in replacing the 20's at this time, and at this point in the season my options are somewhat limited.
I am also going to spot clean the motor. There is that usual gunk around the front timing chain cover (Passenger side). I want it clean to see if it's a true leak or if it's a weep / seep.
Buying this I fully expected to spend some more money to get it sorted. Goal is to take it to 200k. miles. In my view I'll still be ahead compared to leasing new at 4-500/ mo.
Oh, and I already purchased the YOUCANIC Pro UCAN-II-B.
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Old Jan 8, 2025 | 10:02 AM
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Pictures
Let's see some pictures of this unicorn.
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Old Jan 8, 2025 | 11:49 AM
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2017 GLS 550
M276?
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Old Jan 8, 2025 | 11:57 AM
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Originally Posted by FWP!
M276?
3.0TTV6 engine, the most reliable engine MB has produced in the past 20 years.
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Old Jan 8, 2025 | 11:58 AM
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Originally Posted by charlatan
The searching was... painful to say the least, but I got one.
It will become my new adventure rig for the Colorado mountains (based in Denver). When it gets here it needs 3 things;
  1. It has some sort of small leak at the transfer case. It's going straight to a shop to have that identified and remedied.
  2. Both diff fluids will be changed
  3. Winter tires. I've been following some other threads on this. I am not interested in replacing the 20's at this time, and at this point in the season my options are somewhat limited.
I am also going to spot clean the motor. There is that usual gunk around the front timing chain cover (Passenger side). I want it clean to see if it's a true leak or if it's a weep / seep.
Buying this I fully expected to spend some more money to get it sorted. Goal is to take it to 200k. miles. In my view I'll still be ahead compared to leasing new at 4-500/ mo.
Oh, and I already purchased the YOUCANIC Pro UCAN-II-B.
Congrats! Pics!
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Old Jan 8, 2025 | 12:07 PM
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2017 GLS 550
Originally Posted by chassis
3.0TTV6 engine, the most reliable engine MB has produced in the past 20 years.
Yes, I know the engine, so the OP would probably want to move this to the w166 sub-forum - https://mbworld.org/forums/gle-class-w166-206/
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Old Jan 8, 2025 | 03:40 PM
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From: Denver
2017 GLS 450
Originally Posted by Conchasjim
Let's see some pictures of this unicorn.
I will get some once it reaches my front door. It's shipping from Ohio to Denver, and the mid-west is full of weather drama right now.

Originally Posted by chassis
Congrats! Pics!
Thanks, stay tuned! Super stoked. I've been reading the manual.(yep, confirmed dork). My current vehicle is a 2003 7.3L F250. It has, maybe, 6 dials total on the dash and tens of features! It's going to be nice to have vented seats

Originally Posted by FWP!
Yes, I know the engine, so the OP would probably want to move this to the w166 sub-forum - https://mbworld.org/forums/gle-class-w166-206/
I thought about that, but it is a GLS and I only mentioned the engine to distinguish it from the V8, which seemed to be more popular between the two. If it needs to move I am good with that.

I am neck deep in oil / fluids research. I had no idea bobistheoilguy existed until last night. I've come to appreciate Mercedes' attention to detail and how easy it is to consume.
Last edited by charlatan; Jan 8, 2025 at 04:23 PM. Reason: added link
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Old Jan 8, 2025 | 04:40 PM
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Originally Posted by charlatan
it is a GLS and I only mentioned the engine to distinguish it from the V8
Call it a GLS 450. That's the one with the 3 liter engine.

But, it's an X166, not a W166
Last edited by John CC; Jan 8, 2025 at 04:42 PM.
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Old Jan 8, 2025 | 04:59 PM
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From: Denver
2017 GLS 450
Originally Posted by John CC
Call it a GLS 450. That's the one with the 3 liter engine.

But, it's an X166, not a W166
Ohh, duh. I regret my title now. I'll see if I can update it.
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Old Jan 31, 2025 | 12:23 PM
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From: Denver
2017 GLS 450
Originally Posted by Conchasjim
Let's see some pictures of this unicorn.
Finally had a chance to wash it and just had to go skiing ..

I've ordered a new bike rack and am currently looking at roof rack options.
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