Hydraulic Fluid for Roof Pump - Benzworld.org - Mercedes-Benz Discussion Forum

cw4bryant · 07-24-2008, 05:19 AM

Does anyone know what type of hydraulic fluid is used in the pump for refill and can it be simply purchased at your local auto parts store?

silberpfeil1234 · 07-24-2008, 07:46 PM

Hydraulic fluid: Mercedes part#A 000 989 91 03 10, approx 400 ml for a complete fill. It is produced by Aral Vitamol as ZH-M hydraulic fluid. I am not aware of any proven substitute. However, the cost is reportedly only $15.00 per liter. Mercedes also uses this oil in their hydropneumatic suspension, and all the other convertibles old and current so dealers should have stock.

pastbart · 03-23-2009, 04:01 PM

Where do you put the additional fluid in at? Thanks!

oberoi · 03-24-2009, 03:55 PM

[quote=silberpfeil1234;2983509]Hydraulic fluid: Mercedes part#A 000 989 91 03 10, approx 400 ml for a complete fill. It is produced by Aral Vitamol as ZH-M hydraulic fluid. QUOTE]

Just as an aside, my local Benz indy sold me the ZH-M fluid 02615 (made by febi-bilstein) for the power steering. I assume it's the same stuff?

Bruce

salty325 · 03-24-2009, 10:36 PM

Febi Bilstein # 02615 Hydraulic Fluid ZH-M may be cheaper.
Remove the allen bolt plug on the top of the pump, run a tube into the hole. Carefull not to drop the plug, space is tight in there.

pastbart · 03-25-2009, 03:53 PM

Thanks for the info. The top is working again! Is the ram at the top/windshield interface hard to replace?

cacecef · 03-25-2009, 08:47 PM

Yes it is! But can be done. Do a search on top lock replacement...

pastbart · 04-08-2009, 04:41 PM

Thanks for the lead. I'll check it out. Does anyone know if a ram can be rebuilt? Seals, etc?

rpiotro · 04-08-2009, 05:33 PM

Quote:

Originally Posted by pastbart

Thanks for the lead. I'll check it out. Does anyone know if a ram can be rebuilt? Seals, etc?

There have been a couple of threads here about people that were going to attempt it but, I don't know if any of them were actually successful. Part of the problem is that the fitting is not practical to remove. A replacement comes as an assembly with the hose.

In other words, rebuilding is not practical but let us know if you decide to tackle it.

slk230280 · 04-08-2009, 05:37 PM

[quote=oberoi;3388551]

Quote:

Originally Posted by silberpfeil1234

Hydraulic fluid: Mercedes part#A 000 989 91 03 10, approx 400 ml for a complete fill. It is produced by Aral Vitamol as ZH-M hydraulic fluid. QUOTE]

Just as an aside, my local Benz indy sold me the ZH-M fluid 02615 (made by febi-bilstein) for the power steering. I assume it's the same stuff?

Bruce

Was told by MB dealer that steering and roof fluid are not the same. Has anyone tried?