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Old 01-20-2009, 11:07 PM   #1 (permalink)
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Photo DIY: ABC Fluid Maintenance

Granted, this procedure almost unworthy of a Photo DIY! But I think many (such as myself) left most underhood matters to the dealership technicians while the car was under factory warranty coverage. And given the expensive implications (pump damage, etc) if your ABC fluid level isn't maintained, this is probably something everyone should stay on top of.

Sample car is my 2005 CL500, chime in if there are significant differences in other years/models. We are at the right front of the engine compartment (driver's side for left-hand drive cars) as you stand at the bumper looking back toward the engine.

First, the location of the filler/dipstick plugs. (Indicated here by yellow arrows.) There are two and they merely pop off with a squeeze and a pull (they are not threaded). Although the power-steering and ABC systems are interconnected, their reservoirs are separate. The upper, larger one is ABC and the lower, smaller one is for power steering. The larger fittings with the teal-colored labels are the filters.



Once removed, the dipsticks look like this (this is the p.s. one; the ABC one is longer). There are two markings... ***Edit thanks to our resident expert Eric: "Fluid should never be mid range, at the upper detent with engine off, lower detent with engine on." If mid range with engine on then there is too much fluid.

Apparently you can remove them while the engine is running because my mechanic filled them through a clean funnel (highly advised) while the car was idling. And you thought this was DIY

However note 'official' instructions indicate that engine should be switched off!



And now, the secret elixir: M-B Hydraulic Oil Q1 32 0001 (Pentosin CHF 11S; Product Code 1408107). Known colloquially as "ABC Fluid"!



Upon which it clearly states: Do NOT mix with other fluids. Insofar as a couple of members here have apparently experimented with admixtures of this and power-steering leak stop. I cannot in good conscience recommend such a strategy, particularly since those members were never heard from again!

This stuff costs about $37.50 per liter at your dealer. If your W215 has more than 25,000 miles, though, I'd consider the investment. You may never need it, but if you did, wouldn't you want some handy?

PS: See this post for a less-costly alternative Pentosin source. We still need some confirmation on any possible issues with respect to the alternates though. I expect it's the same thing.
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Old 01-28-2009, 11:23 AM   #2 (permalink)
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Ace work Marsden! I'm going to check my dippers this weekend. Did the mechanic say anything about the fluid colour? There's a whole world of folklore about fluid colour(s) in Citroen hydraulic suspension land...
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Old 01-28-2009, 01:14 PM   #3 (permalink)
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The oil my dealership added states: Mehrbereichsöl - Multi-grade oil for powersteering, clutch, gearshift control, hydraulics
A 001 989 24 03 10
The colour is light green
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Old 01-28-2009, 06:46 PM   #4 (permalink)
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If you want to save some $$$$ Pentosin is avaliable at local euro part stores, it comes in a green can its like half price.... and please never put stop leak in the abc
i have witnessed first hand cars that people try to fix leaks with it and it leads to disaster usually pump failures or/including valves to
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Old 09-12-2009, 09:11 PM   #5 (permalink)
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THANK YOU! I am going to check my car tomorrow.
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Old 09-13-2009, 08:33 AM   #6 (permalink)
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On the PS dipstick, I saw the MAX but no MIN. On the ABC, I don't see neither. How do I know if my ABC level is correct? Thanks
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Old 09-17-2009, 04:46 AM   #7 (permalink)
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Very good post,
My ride is 2003m CL500, imported from Germany throw Japan, to the Saudi Arabia my car is not in normal suspensions control I don’t know what is the problems are there, the car is lifting up while stop and pressing the brake pedal once remove my foot from the pedal the car is comes down but when I drove it the level stay at normal position, I change fluid filter for the suspensions which hold part number as shown below.
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Photo DIY: ABC Fluid Maintenance-14092009199.jpg  
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Old 09-17-2009, 05:07 AM   #8 (permalink)
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After that the car still same no improvement, I decided to change the oil for the suspensions with the oil shown below,


see this video youtube


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Photo DIY: ABC Fluid Maintenance-17092009222.jpg   Photo DIY: ABC Fluid Maintenance-17092009220.jpg  

Last edited by mame9999; 09-17-2009 at 05:38 AM.
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Old 09-17-2009, 06:35 AM   #9 (permalink)
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Your ride height sensor is FUBAR.
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Old 09-21-2009, 01:10 AM   #10 (permalink)
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I changed my ABC filter and flushed the system. I would recommend it. I was a Auto tech for 18 years and you should see how bad the fluid gets. I think you should do that too both the ABC and the P S ( Power steering ) systems every 30,000 miles. The P S has a filter too. And don't forget your transmission Filter about every 50,000 miles. My oil was different, it came in the Blue MB can as above. Our MB Dealer did not have it in a bottle. GLTA

Last edited by Scheid27; 09-21-2009 at 01:15 AM.
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