I have been unable to locate much information online on the manual 6-speed gearbox installed in my W205. My transmission model is (716754 00 035017), abbreviated as 716.7 in the WIS.
Several internet video guides for different MB models mention a 14mm hex bolt for loosening the drain and fill screws; however, it seems that my screws are far smaller at 8mm.
Prior to unscrewing these plugs, I would want to verify that I possess the appropriate drain and fill screws (see to the photo). Are they accurate?
W205 6-Speed Manual Transmission - Oil Replacement
-
veroguittar
- Senior
- Posts: 80
- Joined: Mon Jul 19, 2021 8:45 pm
What is the reason behind that? Is that intended to guarantee the complete drainage of oil by eliminating an airlock?
-
MBcarOWNER
- Moderator
- Posts: 137
- Joined: Fri Sep 13, 2019 2:15 pm
Draining the oil first and then being unable to remove the filler cap results in a gearbox devoid of oil, which constitutes a significant issue.
Those plugs will be secure.
Those plugs will be secure.
-
RogerSalesCar
- Senior
- Posts: 86
- Joined: Sat Aug 24, 2019 10:25 pm
What is the reason for changing the oil?
-
MercedesMan98
- Moderator
- Posts: 155
- Joined: Fri Mar 20, 2020 8:40 pm
Additionally, as others have said, it is essential to guarantee that it can be refilled if depleted. 
-
veroguittar
- Senior
- Posts: 80
- Joined: Mon Jul 19, 2021 8:45 pm
That is a valid observation; I will proceed accordingly.
-
veroguittar
- Senior
- Posts: 80
- Joined: Mon Jul 19, 2021 8:45 pm
The vehicle is now over a decade old with 70,000 miles and has never undergone a replacement.
MB Manchester states that the "typical interval for manual transmissions to undergo a fluid change is between 30,000 and 60,000 miles."
Is this advice accurate?
MB Manchester states that the "typical interval for manual transmissions to undergo a fluid change is between 30,000 and 60,000 miles."
Is this advice accurate?
-
veroguittar
- Senior
- Posts: 80
- Joined: Mon Jul 19, 2021 8:45 pm