M-Class (W164) Produced 2006-2011: ML280CDI, ML320CDI, ML420CDI, ML350, ML500, ML550

How to check (or replace) the trans fluid for 2009 ML550?

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Old Jul 19, 2022 | 10:54 AM
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2009 ML550
Unhappy How to check (or replace) the trans fluid for 2009 ML550?

Hello guys,

I am new with this forum. Hope everything is good with you.

A quick question. I have about 155k miles on the truck. I believe it's time to check or change transmission fluid for her. But there is no dip stick and no idea how to check or change.

Thanks in advance.

John
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Old Jul 19, 2022 | 08:18 PM
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From: MBworld
bone stock E55 AMG
moved to W164 forum...
you flush it and top it off...
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Old Jul 20, 2022 | 08:18 PM
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'10 CL550, '12 GL550
There is no “checking” fluid with this transmission.

Change fluid and filter every 40k miles.

Fluid is added via same hole as drain hole. Therefore it is pumped in, and special tools are required. Amount to add is related to temperature. Vehicle must be level.

Oil pan is held on by aluminum bolts that are one time use only. They stretch.

https://blog.fcpeuro.com/mercedes-7-...-transmissions



Last edited by lkchris; Sep 17, 2022 at 03:42 PM.
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Old Sep 7, 2022 | 07:21 AM
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2010 ML550 VIN WDC1641722A564750, 2010 B180
When you do the service, check the bell housing for an inspection hatch. If you have one, 4emove the rubber cover and you might have a drain plug for the torque converter as well. It seems not all models/years have them. Youll get up to 3 more quarts out of it of you do.
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Old Sep 26, 2022 | 05:36 PM
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Now written up in W221 area

https://mbworld.org/forums/s-class-w...nge-flush.html

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