Change interval for Transfer case and tranny fluids
Thread Starter
Member
Joined: Sep 2012
Posts: 154
Likes: 29
From: MA
e350 4matic wagon 2009
Change interval for Transfer case and tranny fluids
My 2009 E350 4matic wagon manual says to change the transfer case oil and transmission fluid at 40,000 miles...BUT...when I took it to a local certified indie mechanic (good reputation) he told me I didn't have to do the tranny fluid until 100K miles and don't do the transfer case oil unless there's a problem because "it's a sealed system and there's no need to go opening it up unless there's a problem". Is this correct / good advice? I don't want to spend $ unnecessarily, but if it should be done I'd rather pay now than later. Any help is appreciated.
Super Member
Joined: Jan 2010
Posts: 563
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From: The Villages, Florida
2006 E320 CDI
My indie, who is a great guy, told me the same thing, saying that the synthetic fluid will last the life of the transmission. So it looks like I will be off to the MB dealer for the transmission service. I am also one to believe that changing the power steering fluid is a good idea, especially with the rack and pinion system giving the fluid a workout.
Mike T.
Mike T.
Thread Starter
Member
Joined: Sep 2012
Posts: 154
Likes: 29
From: MA
e350 4matic wagon 2009
Thanks guys. I will get both jobs done. The mechanic may be right, but it certainly can't hurt to have it done. Power steering fluid sounds like a good idea too and I'll explore having that done as well.
Any idea how much each of these jobs should cost?
Any idea how much each of these jobs should cost?
Senior Member
Joined: Jul 2013
Posts: 493
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84 300d 2009 e320 bluetec (retired)/, now 2012 E350 4-matic blueefficiency automatic
ATF does last a life time. When the tranny dies, the life time is up.
Check the TSB. I would change the fluid at 40,000 miles.
Check the TSB. I would change the fluid at 40,000 miles.
