Genuine MB trans fluid or Shell ATF 134/ FUCHS 134?
Thread Starter
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Joined: Nov 2015
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From: Sunny CA
2005 S55 AMG Designo, (sold)2001 ML55 Designo, (sold)2004 C32 AMG, RIP 2005 Volvo s40 2.4i
Genuine MB trans fluid or Shell ATF 134/ FUCHS 134?
I've been wanting to do a tranny flush for a while now. I haven't done one even when I bought the car. My mechanic said it was fine so now I had him recheck 11k miles later and he says it's definitely time for one. In my cart, I have the genuine filter, genuine gasket/seal, genuine clip and all I need is the fluid (unless I need more parts for a tranny flush kit like the conductor plate etc). I've read that Fuchs was a supplier for mb but then read that it was actually Mobil and Fuchs wasn't ever approved.
I was reading some old posts and saw some member upgraded to a better fluid for the 7 speed autos and saw no problems other than some people experience shift delays or lighter feel if that even is a problem.
I don't know what fluid is currently in it so my gut says to go with the genuine fluid because of how sensitive transmissions can be to different fluids. What do y'all recommend? Shell atf is under 10 a quart and double for the mb fluid.
I was reading some old posts and saw some member upgraded to a better fluid for the 7 speed autos and saw no problems other than some people experience shift delays or lighter feel if that even is a problem.
I don't know what fluid is currently in it so my gut says to go with the genuine fluid because of how sensitive transmissions can be to different fluids. What do y'all recommend? Shell atf is under 10 a quart and double for the mb fluid.
Last edited by Oshkoshbigjosh; Mar 15, 2018 at 08:40 PM.
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From: Tucson, AZ
'20 X5 M50i; '17 Ram 3500; Golf Cart; Bikes; Scooters
Replace the 13 pin electrical connector and seal while you’re at it as they are cheap and leak frequently.
I did do some research when changing my trans fluids and found the new 7 speed blue fluid is backward compatibile to the 5 speed red fluid.
I have not installed the blue 722.9 fluid in the 722.6, but I have a dozen quarts ready when needed.
Currently have both MB label (they don’t make their own), and Fuchs used in my 5 speeds I’ve changed. No issues.
Only have used MB label in my 7 speed as they are fragile compared to the 5 speed, and it was still under warranty.
I did do some research when changing my trans fluids and found the new 7 speed blue fluid is backward compatibile to the 5 speed red fluid.
I have not installed the blue 722.9 fluid in the 722.6, but I have a dozen quarts ready when needed.
Currently have both MB label (they don’t make their own), and Fuchs used in my 5 speeds I’ve changed. No issues.
Only have used MB label in my 7 speed as they are fragile compared to the 5 speed, and it was still under warranty.
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Joined: Feb 2011
Posts: 2,562
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From: Austin, TX
2006 E55, 2012 GLK350 & 1992 190e sportline
Replace the 13 pin electrical connector and seal while you’re at it as they are cheap and leak frequently.
I did do some research when changing my trans fluids and found the new 7 speed blue fluid is backward compatibile to the 5 speed red fluid.
I have not installed the blue 722.9 fluid in the 722.6, but I have a dozen quarts ready when needed.
Currently have both MB label (they don’t make their own), and Fuchs used in my 5 speeds I’ve changed. No issues.
Only have used MB label in my 7 speed as they are fragile compared to the 5 speed, and it was still under warranty.
I did do some research when changing my trans fluids and found the new 7 speed blue fluid is backward compatibile to the 5 speed red fluid.
I have not installed the blue 722.9 fluid in the 722.6, but I have a dozen quarts ready when needed.
Currently have both MB label (they don’t make their own), and Fuchs used in my 5 speeds I’ve changed. No issues.
Only have used MB label in my 7 speed as they are fragile compared to the 5 speed, and it was still under warranty.
there has been a lot of people saying the new fluid is giving them problems.
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Thread Starter
Senior Member
Joined: Nov 2015
Posts: 292
Likes: 19
From: Sunny CA
2005 S55 AMG Designo, (sold)2001 ML55 Designo, (sold)2004 C32 AMG, RIP 2005 Volvo s40 2.4i
ive been doing a small amount of reading on max life but so far it's been positive. I might go this route instead since I can pick it up near me when the parts get here. Thanks for the input
Thread Starter
Senior Member
Joined: Nov 2015
Posts: 292
Likes: 19
From: Sunny CA
2005 S55 AMG Designo, (sold)2001 ML55 Designo, (sold)2004 C32 AMG, RIP 2005 Volvo s40 2.4i
Replace the 13 pin electrical connector and seal while you’re at it as they are cheap and leak frequently.
I did do some research when changing my trans fluids and found the new 7 speed blue fluid is backward compatibile to the 5 speed red fluid.
I have not installed the blue 722.9 fluid in the 722.6, but I have a dozen quarts ready when needed.
Currently have both MB label (they don’t make their own), and Fuchs used in my 5 speeds I’ve changed. No issues.
Only have used MB label in my 7 speed as they are fragile compared to the 5 speed, and it was still under warranty.
I did do some research when changing my trans fluids and found the new 7 speed blue fluid is backward compatibile to the 5 speed red fluid.
I have not installed the blue 722.9 fluid in the 722.6, but I have a dozen quarts ready when needed.
Currently have both MB label (they don’t make their own), and Fuchs used in my 5 speeds I’ve changed. No issues.
Only have used MB label in my 7 speed as they are fragile compared to the 5 speed, and it was still under warranty.
ill do a bit more reading before I get the fluid but it does seem like the ones for the 7 speed have mixed reviews. Thanna again
Thread Starter
Senior Member
Joined: Nov 2015
Posts: 292
Likes: 19
From: Sunny CA
2005 S55 AMG Designo, (sold)2001 ML55 Designo, (sold)2004 C32 AMG, RIP 2005 Volvo s40 2.4i
