Just trying to research on how to change the transmission fluid and front/rear differential on a 2021 GLB. I searched and can't find any info at all. Any insight would be greatly appreciated.

 

Trans & front diff same liquid : MB 236.22, Rear diff using : MB 75W85 but I always use more common 75W90 synthetic with no issue.

 

Let me jump in on this one and maybe a not-so-hostile takeover of the thread, I have a 2022 GLB 250 4M. It has the 724.1 8spd. Not a lick of info on how to change the trans fluid and filters online, except with some creative wording, I was able to find some snippets, but very little clarity on procedure. So, the 22 has the three filters external, trans cooler on top, short and tall from the bottom, and a flat filter inside the pan. All the technical parts of changing the filters and draining fluid is easy from my seat. What scares the bejesus out of me is the fluid replacement procedure. I have the iCarsoft V4.0MB, and it has the trans fluid procedure in it to guide, not Xentry, but as far as I can tell it is worthy. Here is my question, does anyone have any advice on replacing fluid and the fill procedure? I called my local Indi and they quoted me $450 to do it, since I already have the parts kit. Might just let them do it but ask a lot of questions and see if they will let me observe. See one, do one, teach one!

Thanks.

 

Do you have access to WIS? You should find service intervals and procedures there.

 

In 2020-2021 MB replaced WIS & EPC with B2B Connect subscription service for authorized 3rd party repair and maintenance shops. It’s too expensive for DIYers. There is a one day/one service option available that I haven’t investigated.

The parts & fluid for the 8G DCT 724 transaxle run about $250. My dealer wants over $800 for the service. My local indy shop did it for $482 parts & labor. There is saving for a DIY if the one day access isn’t too expensive.