SL-Class (R231) 2013 on: Discussion on the SL550

SL/R231: Hydraulic fluid

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Old Dec 10, 2022 | 12:09 AM
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2013 SL550
Hydraulic fluid

Hello
Could someone point out what hydraulic fluid to get. I had a leak in one of the hydraulic pipes in the trunk so now need to refill the hydraulic fluid. What fluid should i get? And any tricks to refill it. Did some research and couldn't find what to get. Stealership is charging arm and leg for it.
Thank you for help
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Old Dec 10, 2022 | 03:53 AM
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2020 GLC300 -2014 Sl550 - 1997 SL600
Your top will use Hydraulikol / ZH-M ( MB part number 000989910310 )
Febi Hydraulikol Febi Hydraulikol


I think the easiest way to fill the reservoir is to use a syringe with a tube attached to it. That’s what the official MB tool looks like.
There should be a fill plug on the side of the plastic reservoir. (see last picture)

It’s fairly self explanatory, but I’ll try to post the procedure from the WIS (for the R231) when I get back into my shop, and have access to my laptop with SDS.

The link above is for Hydraulikol from FEBI
Heres the Mercedes official version

MB Hydraulikol MB Hydraulikol




R231 Hydraulic reservoir fill plug:

Last edited by crconsulting; Dec 10, 2022 at 04:32 AM.
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Old Dec 11, 2022 | 09:54 AM
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2015 SL400 (M276 Turbo), 2014 C350 Sport (M276 NA), 2004 SL500 (M113), 2004 Audi TT225 (BEA)
These leaks seem to be not uncommon. It appears from service records that the previous owner to my car had a line on the passenger side of the trunk replaced, and I had one on the driver side. Mine was covered by an extended warranty, but the invoice was about $1000. The hydraulic line part was about $100. Lots of labor involved.
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Old Dec 11, 2022 | 09:55 PM
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2013 SL550
Thanks for letting me know. Another question. Do i just replace the leaking pipe or do i need to bleed the lines somehow?
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Old Dec 12, 2022 | 09:53 AM
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No bleeding, but you’ll may need to cycle the top/trunk a few times.

Good Luck
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