Correct Power Steering Fluid
Thread Starter
Senior Member
Joined: Oct 2009
Posts: 269
Likes: 4
From: New York
03 SL500(Sold), 09 C300, 11 E550
Correct Power Steering Fluid
Hello All, i posted this over in the coupe forum but it doesn't seem like anyone knows the answer. (2011 E550 coupe)
When asking local auto parts stores they are telling me to use "Pentosin CHF 11S" to fill up the power steering reservoir. Can anyone confirm this is the correct fluid? i only ask because the owners manual says to use an " Approved ATF" which would lead me to believe it would be non synthetic? Anyone knowledgeable on the topic feel free to chime in. Thank you!
When asking local auto parts stores they are telling me to use "Pentosin CHF 11S" to fill up the power steering reservoir. Can anyone confirm this is the correct fluid? i only ask because the owners manual says to use an " Approved ATF" which would lead me to believe it would be non synthetic? Anyone knowledgeable on the topic feel free to chime in. Thank you!
Thread Starter
Senior Member
Joined: Oct 2009
Posts: 269
Likes: 4
From: New York
03 SL500(Sold), 09 C300, 11 E550
topped off with the pentosin last night and on a cold start this morning the grinding is gone, Steering felt much tighter on the drive to work this morning. Filled to the max line on the meter attached to the cap.
Junior Member
Joined: May 2014
Posts: 22
Likes: 1
From: Las Vegas, NV
2001 ML320; 2007 CLK350, 2011 E550 Coupe, 2020 E450 Coupe
Reservoir location on 2011 Coupe 550
Can you tell me where the reservoir is located for the power steering. I also have a 2011 coupe and I am getting a whining noise when turning. Would like to first check fluid level. Thanks!
Out Of Control!!
Joined: Jul 2003
Posts: 15,901
Likes: 4,630
From: North Scottsdale, AZ
'71 Pinto
Check here to see if vehicle is included in recall 2010100002 high pressure steering line pump connection may cause fluid loss: https://www.mbusa.com/mercedes/recall + confirm by having dealer check VMI.
Member
Joined: Apr 2015
Posts: 177
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C207
FYI
Found out that this version of pentosin CHF 201 is old stuff and has been replaced by the newer version CHF 202.
It says they are fully compatible, the same green color.
More info about it is welcome to make a right decision.
Found out that this version of pentosin CHF 201 is old stuff and has been replaced by the newer version CHF 202.
It says they are fully compatible, the same green color.
More info about it is welcome to make a right decision.
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Out Of Control!!
Joined: Jul 2003
Posts: 15,901
Likes: 4,630
From: North Scottsdale, AZ
'71 Pinto
No changes here https://bevo.mercedes-benz.com/bevolisten/345.0_en.html
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Joined: Jul 2025
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i have a 2013 E350 4Matic that is new to me, and i noticed the steering wheel is very lazy/slow to go back to center after turning it in either direction. It has 79k miles on it, and i think the power steering fluid is original. Thinking of flushing it to see if it helps. Is this a common issue on these cars? Also, has anyone used Pentosin CHF202 to flush their power steering fluid, or does it have to be CHF11S? thanks.
