GLS Class (X166) Produced from 2016 to 2019

2017 GLS550 Drivetrain Fluids

Thread Tools
 
Search this Thread
 
Rate Thread
 
Old 05-06-2024, 12:47 PM
  #1  
Newbie
Thread Starter
 
DaniloSilni's Avatar
 
Join Date: May 2024
Posts: 11
Received 2 Likes on 2 Posts
2017 GLS550
2017 GLS550 Drivetrain Fluids

Hi All, just got a new to me GLS 550 that was dealer serviced only. I look forward to contributing a lot to these forums.

The search hasn’t yielded me any qualified results, and I am seeing conflicting information all over the Internet. Could someone please help me with specs and quantities of all the drivetrain fluids? Dealer parts dept was **** as well, and couldn’t get any tech’s on the phone.

Going to be doing the engine oil and tranny oil, but also looking for info on the diffs/transfer case and whatever else there may be.

thanks a bunch!


Here she is


The following users liked this post:
clarkpittman (05-07-2024)
Old 05-06-2024, 01:28 PM
  #2  
Out Of Control!!

 
chassis's Avatar
 
Join Date: Sep 2018
Location: unbegrenzt
Posts: 13,345
Received 3,934 Likes on 3,098 Posts
2017 GLE350 4MATIC
Originally Posted by DaniloSilni
Hi All, just got a new to me GLS 550 that was dealer serviced only. I look forward to contributing a lot to these forums.

The search hasn’t yielded me any qualified results, and I am seeing conflicting information all over the Internet. Could someone please help me with specs and quantities of all the drivetrain fluids? Dealer parts dept was **** as well, and couldn’t get any tech’s on the phone.

Going to be doing the engine oil and tranny oil, but also looking for info on the diffs/transfer case and whatever else there may be.

thanks a bunch!


Here she is

Nice looking GLS!

Oft-discussed topic and well documented on this site.

Click the DIY link in my signature.

Go to the operating fluids site.

Last edited by chassis; 05-06-2024 at 01:34 PM.
Old 05-06-2024, 02:19 PM
  #3  
Newbie
Thread Starter
 
DaniloSilni's Avatar
 
Join Date: May 2024
Posts: 11
Received 2 Likes on 2 Posts
2017 GLS550
Thanks chassis!
The following users liked this post:
chassis (05-06-2024)
Old 05-06-2024, 02:23 PM
  #4  
Member
 
wheatswake's Avatar
 
Join Date: Apr 2016
Location: Houston, TX
Posts: 137
Received 38 Likes on 31 Posts
2017 S550 coupe, 2013 E550 coupe, 2008 Tahoe
Get the Benz-ninja setup. It will answer all your questions, save you thousands of monies and you will be able to customize systems/features.
The following users liked this post:
DaniloSilni (05-22-2024)
Old 05-06-2024, 02:49 PM
  #5  
Out Of Control!!

 
chassis's Avatar
 
Join Date: Sep 2018
Location: unbegrenzt
Posts: 13,345
Received 3,934 Likes on 3,098 Posts
2017 GLE350 4MATIC
Operatingfluids.Mercedes-Benz.com
The following users liked this post:
DaniloSilni (05-06-2024)
Old 05-06-2024, 06:11 PM
  #6  
Out Of Control!!

 
chassis's Avatar
 
Join Date: Sep 2018
Location: unbegrenzt
Posts: 13,345
Received 3,934 Likes on 3,098 Posts
2017 GLE350 4MATIC
I used GLS550 X166 with 9G-Tronic transmission, no off road engineering package, standard front and rear differentials.

https://operatingfluids.mercedes-benz.com/sheet/231.1

Rear axle with standard differential: spec 235.7, weight 75W-85, buy two 1 liter bottles
Front axle: spec 239.72, weight 75W-85, buy one 1 liter bottle
Transfer case: spec 236.12, no weight given, buy one 1 liter bottle
Transmission 9G-Tronic: spec 236.17, no weight given

Best practice is have the dealer or indy change the transmission oil. Front and rear axle, and transfer case oil changes are easy DIY jobs.

Buy new fill and drain plugs. Part numbers in the DIY.

The first step for drivetrain oil change is to confirm the fill plug can be removed. This avoids the situation where the oil is first drained, and the fill plug is stuck. The device is then devoid of oil and you would be in a pickle.

Buy all of the fluids at the dealer. Read the DIY for quantity.

Last edited by chassis; 05-06-2024 at 06:17 PM.
Old 05-17-2024, 12:21 AM
  #7  
Member
 
FWP!'s Avatar
 
Join Date: Jul 2015
Posts: 115
Received 35 Likes on 26 Posts
2017 GLS 550
I put royal purple 75w-90 in the rear diff a long time ago, about 30k miles now. Engine oil I always buy this kit and do it myself - https://www.fcpeuro.com/products/mer...y-2761800009kt
Old 05-22-2024, 08:35 AM
  #8  
Newbie
Thread Starter
 
DaniloSilni's Avatar
 
Join Date: May 2024
Posts: 11
Received 2 Likes on 2 Posts
2017 GLS550
Thanks to all for the help - wanted to give an update.

Just completed the transmission oil/filter/pan:

https://www.fcpeuro.com/products/mer...i-moly-22034kt

also did the engine oil, but using 0W-40 for some reason. For NY climate and driving, I do think I will switch to 5W-40:

https://www.fcpeuro.com/products/mer...761800009166kt

had a friend help me with resealing the cam valve covers where I noticed a lot of oil seepage - luckily It appears that there were no damage to the wiring harnesses:



While there, I changed all four cam magnets and also all four cam sensors from fcp and installed the wiring protection kit:

https://www.fcpeuro.com/products/mer...-2761560790kt1

Engine air filters were never changed after 95k miles even though the dealer said they were. The original 2016 manu date appears to prove otherwise:





New Bosch plugs, boots and coils were also replaced.

The front and rear diff/transfer case specs were driving me nuts, especially because three different MB dealers gave me three different part numbers so after much frustration and researched I just ordered the following and will replace in the next week or two when I get around to it:

transfer case-https://www.fcpeuro.com/products/mercedes-atf-fuchs-001989680313

both diffs:
https://www.fcpeuro.com/products/bmw...bi-83222295532

if anyone has front diff/rear diff/ transfer case drain and fill plug part numbers handy, I’ll take them!

Brakes and fluid was done by dealer recently. Down the line will be doing a coolant and power steering flush.

Thanks, all.




Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 


You have already rated this thread Rating: Thread Rating: 0 votes,  average.

Quick Reply: 2017 GLS550 Drivetrain Fluids



All times are GMT -4. The time now is 12:10 AM.