Transmission oil change
Thread Starter
Member
Joined: May 2014
Posts: 214
Likes: 3
From: Lebanon
2009 C350
Transmission oil change
hello folks, im seeking your help here i cant decide whether to change my tranny oil + seal + filter. Ive read that these trannys are sealed for life, so i was changing my engines oil today and did a check up on the transmission oil, its color was some how black and the indy recommended to change the filter and seal with 4 liters on transmission oil , i drive a c230 komp 2005 sedan and it has around 191k miles on it , never did a transmission oil before , id appreciate any help here from you guys.
MBWorld Fanatic!
Joined: Jan 2005
Posts: 2,848
Likes: 15
From: Orange County
2005 C Wagon (No snickering please!)
The points that need careful consideration are that you need a dipstick to measure the amount of fluid in the transmission, it takes a very long time to drain with the pan removed, and you should change the electrical connector seal while the fluid is out.
The precise level of the fluid is critical for correct operation of the transmission. The dipstick is the only sure way to know you have the correct amount.
When you remove the pan there will be a big whoosh of fluid that pours out of the box. That takes a few seconds. Then you have to be patient while the rest of the old fluid makes it way out of the gear sets. If you can leave it overnight, that is best.
While the box is draining change the connector seal. It is cheap compared to a transmission module full of fluid. I don't know why the Germans can't design an oil seal that works, but it is best to keep an eye on any electrical connection to an engine or transmission. Now is the time to make the pan dinner plate clean along with anything else you can see.
Refill measuring carefully and you should be good to go.
The precise level of the fluid is critical for correct operation of the transmission. The dipstick is the only sure way to know you have the correct amount.
When you remove the pan there will be a big whoosh of fluid that pours out of the box. That takes a few seconds. Then you have to be patient while the rest of the old fluid makes it way out of the gear sets. If you can leave it overnight, that is best.
While the box is draining change the connector seal. It is cheap compared to a transmission module full of fluid. I don't know why the Germans can't design an oil seal that works, but it is best to keep an eye on any electrical connection to an engine or transmission. Now is the time to make the pan dinner plate clean along with anything else you can see.
Refill measuring carefully and you should be good to go.
Thread Starter
Member
Joined: May 2014
Posts: 214
Likes: 3
From: Lebanon
2009 C350
The points that need careful consideration are that you need a dipstick to measure the amount of fluid in the transmission, it takes a very long time to drain with the pan removed, and you should change the electrical connector seal while the fluid is out.
The precise level of the fluid is critical for correct operation of the transmission. The dipstick is the only sure way to know you have the correct amount.
When you remove the pan there will be a big whoosh of fluid that pours out of the box. That takes a few seconds. Then you have to be patient while the rest of the old fluid makes it way out of the gear sets. If you can leave it overnight, that is best.
While the box is draining change the connector seal. It is cheap compared to a transmission module full of fluid. I don't know why the Germans can't design an oil seal that works, but it is best to keep an eye on any electrical connection to an engine or transmission. Now is the time to make the pan dinner plate clean along with anything else you can see.
Refill measuring carefully and you should be good to go.
The precise level of the fluid is critical for correct operation of the transmission. The dipstick is the only sure way to know you have the correct amount.
When you remove the pan there will be a big whoosh of fluid that pours out of the box. That takes a few seconds. Then you have to be patient while the rest of the old fluid makes it way out of the gear sets. If you can leave it overnight, that is best.
While the box is draining change the connector seal. It is cheap compared to a transmission module full of fluid. I don't know why the Germans can't design an oil seal that works, but it is best to keep an eye on any electrical connection to an engine or transmission. Now is the time to make the pan dinner plate clean along with anything else you can see.
Refill measuring carefully and you should be good to go.
MBWorld Fanatic!
Joined: Mar 2004
Posts: 1,175
Likes: 24
From: Boston, MA
'14 ML350, '13 C220 CDI, '07 C280, '98 ML320
is it really sealed?
Or you can change fluid and prolong that 'life' of the transmission.
