Trans/Diff Service & Fluid
Thread Starter
Member
Joined: Mar 2012
Posts: 119
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2004 SL500 // 2015 S550
Trans/Diff Service & Fluid
Hello, about to dive into servicing the Trans and Diff on my 2015 S550 and have a question on fluids. I see that the FTP Euro kit has good reviews for our cars, and includes Pentosin 134-FE fluid. Anyone use this brand fluid first-hand?
Regarding the differentials, I'm trying to determine what brand oil is acceptable. I believe I saw one user use Motul. I confirmed w dealer it should be 75w85. Also, are there some W222s that require anti-slip additive? (VIN WDDUG8FB2FA080012)
Can anyone comment on the fluids they have used in the trans/diff? After extensively searching, I could not find a good video of a W222 trans and diff service, although there are several on the 722.9s and 4matics on other cars. Just curious as to your first hand experience for those that have completed this service.
Regarding the differentials, I'm trying to determine what brand oil is acceptable. I believe I saw one user use Motul. I confirmed w dealer it should be 75w85. Also, are there some W222s that require anti-slip additive? (VIN WDDUG8FB2FA080012)
Can anyone comment on the fluids they have used in the trans/diff? After extensively searching, I could not find a good video of a W222 trans and diff service, although there are several on the 722.9s and 4matics on other cars. Just curious as to your first hand experience for those that have completed this service.
Out Of Control!!
Joined: Sep 2018
Posts: 14,691
Likes: 4,584
From: unbegrenzt
2017 GLE350 4MATIC
Hello, about to dive into servicing the Trans and Diff on my 2015 S550 and have a question on fluids. I see that the FTP Euro kit has good reviews for our cars, and includes Pentosin 134-FE fluid. Anyone use this brand fluid first-hand?
Regarding the differentials, I'm trying to determine what brand oil is acceptable. I believe I saw one user use Motul. I confirmed w dealer it should be 75w85. Also, are there some W222s that require anti-slip additive? (VIN WDDUG8FB2FA080012)
Can anyone comment on the fluids they have used in the trans/diff? After extensively searching, I could not find a good video of a W222 trans and diff service, although there are several on the 722.9s and 4matics on other cars. Just curious as to your first hand experience for those that have completed this service.
Regarding the differentials, I'm trying to determine what brand oil is acceptable. I believe I saw one user use Motul. I confirmed w dealer it should be 75w85. Also, are there some W222s that require anti-slip additive? (VIN WDDUG8FB2FA080012)
Can anyone comment on the fluids they have used in the trans/diff? After extensively searching, I could not find a good video of a W222 trans and diff service, although there are several on the 722.9s and 4matics on other cars. Just curious as to your first hand experience for those that have completed this service.
Senior Member
Joined: Jul 2023
Posts: 296
Likes: 91
S550 V8, CL600 V12, SLK32 AMG
Diff is super easy. Its a 14mm hex if I remember. Just open the fill hole plug first. Then drain plug.
Get new plugs, they are cheap so why bother with old ones. I used Permatex High Temp thread sealant. My preference.
Torque to 50 NM.
Fill up until fluid dumps on your face and you are done.
For the fluid I used Mercedes Hypoid Gear Oil 75w-85. Expensive, but again if you do it yourself, why not.
Did not see anything about anti slip. All I found in Alldata was this
Hypoid Gear Oil meeting MB specification 235.7
MB 235.7 / 235.74 FE Hypoid Gear Oil
Part Number .................... A 001 989 33 03
Get new plugs, they are cheap so why bother with old ones. I used Permatex High Temp thread sealant. My preference.
Torque to 50 NM.
Fill up until fluid dumps on your face and you are done.
For the fluid I used Mercedes Hypoid Gear Oil 75w-85. Expensive, but again if you do it yourself, why not.
Did not see anything about anti slip. All I found in Alldata was this
Hypoid Gear Oil meeting MB specification 235.7
MB 235.7 / 235.74 FE Hypoid Gear Oil
Part Number .................... A 001 989 33 03
Member
Joined: Jul 2020
Posts: 114
Likes: 91
From: So CALi
| 2015 S63 / 2013 5.7 Tundra |
As said rear diff is easy, and the instructions given are correct, but do try and only fill to the prescribed amount. I used Valvoline full synthetic gear lube of the correct weight, if you get it in the plastic bag (let it sit in the sun while you jack up the car) as opposed to the plastic bottle you won't need a pump.
The trans is a bit more involved and you will need a pump as well as an adapter to fill it through the drain hole (The front diff is filled this way too on 4matic cars). You'll also need some means to read the trans temp with the car running (scan tool, ir temp gun). I HIGHLY RECOMMEND WATCHING FCP EUROS VIDEO ON DOING THIS. Good luck.
The trans is a bit more involved and you will need a pump as well as an adapter to fill it through the drain hole (The front diff is filled this way too on 4matic cars). You'll also need some means to read the trans temp with the car running (scan tool, ir temp gun). I HIGHLY RECOMMEND WATCHING FCP EUROS VIDEO ON DOING THIS. Good luck.
