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ABC System Hydraulic Fluid-2004 SL500

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ABC System Hydraulic Fluid-2004 SL500

Old 04-02-2011, 07:49 PM
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2004 SL500
ABC System Hydraulic Fluid-2004 SL500

I just traded in my 96 SL500 for an 04 SL500 with 26,000 miles. Three questions. The book does not label all of the engine compartment.

1. There is a black filler cap with a small dip stick on it just in front of the shock on the drivers side. Is that the ABC filler? If so, it is showing right at the bottom of the little dip stick.

2. The book says that you need to use Mercedes Hydraulic fluid. Is this the same Mercedes fluid that I used to refill my convertible top hydraulic reservoir in the trunk on the 96? That was official Mercedes Hydraulic fluid.

3. I have almost a full quart of Mercedes Hydraulic fluid-ZH-M and want to make sure that I use the right fluid. Is this the correct fluid?

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Old 04-07-2011, 02:28 AM
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1987 190E 2.3
No ABC fluid is different. Comes in a blue metal can.

Yes it is a duel power steering/ABC pump reservoir. ABC fluid is the one with the ~six inch dipstick and needs to be checked while running.
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Old 06-05-2018, 06:13 PM
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2003 Mercedes sl500 & 2012 C300 4matic
ABC system

Just a suggestion about your ABC system in mid 2000 SL500's. The two marks on the dipstick are for running and when car is off. The top one is for at rest and bottom is for while running. Pretty obvious. But you might run into an issue if you refill or top off while car is running (tank will be much lower). First, it takes maybe 30 minutes for the fluid to flow back into the reservoir after shutting off the car. I noticed that if you fill it WHILE running, there is a VERY good chance you will end up with fluid overfill, running down the tank and onto the floor. When I did a flush and rodeo I saw that the fluid level while running was lower than expected. If you fill to the "while running" mark when you shut the car off, the excess fluid flows back into the tank and overflows. Make sure that you wait 30 minutes AFTER you turn the car off and check the level. AS long as it is just below the top of the reservoir tank you will be ok while running. It is a closed system so there is no where else for the fluid to go.
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