Active Body Control System Can Leak Hydraulic Fluid on Mercedes-Benz S55 AMG

The active body control system can leak fluid from numerous areas, including the tandem pump, hydraulic lines, struts, and/or seals. If it is not repaired, the vehicle ride height could drop too low and cause damage to the undercarriage.

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Average mileage: 108,951 (10,900–206,000)
6 model years affected: 2001, 2002, 2003, 2004, more2005, 2006
60 people reported this problem
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Viewing 1 - 20 of 38 problem details
starting to notice regular ABC visit workshop messages. I keep my eyes on the Hydraulic fluid levels to ensure that the system doesn't run dry. Now car won't raise or lower, also noticing continuous drip underneath the car. Seems to be occuring in the front, near pulley but can't tell due to the frame. I can see fluid dripping from the bottom of what looks like the tandem pump, but could be coming from a high pressure hose connected to it, can't tell. Starting to prepare for a huge repair bill.
2002 Mercedes-Benz S55 AMG 114,000 mi,
Active Body Control light is on and the Steering wheel is so hard to turn. what shoul I do? Please help!!! oh and the Temperature needle went all the way to the top. I even added cooling fluid. Help!!! How much does this thing is going to cost me.
2001 Mercedes-Benz S55 AMG 125,000 mi,
out of no where, fluid was pouring out under the car and after i popped the hood, saw all this fluid spitting out of the ABC housing/cap area. I'm scared of what this is going to cost. Had no warning or issues with the suspension prior.
2003 Mercedes-Benz S55 AMG 80,000 mi,
My Abc pump is leaking from front seal. I disassembled the pump and i see that i must change the seal (28x40x7.6) and two or-ings.
2002 Mercedes-Benz S55 AMG 115,000 mi,
Need new ABC pump.
2003 Mercedes-Benz S55 AMG 48,000 mi,
Has multiple leaks from some of the hoses located on the driver side
I had a power steering fluid seal go bad and the garage that worked on it put power steering fluid in the ABC fluid housing which made the ABC system suck up the power sterring fluid and it caused the whole ABC system to go bad. mercedes fixed it, but it was $3000 to flush the system and buy a new pump.
2005 Mercedes-Benz S55 AMG 58,000 mi,
Fluid is leaking from either the reservoir or a hydraulic line, red warning light on the dash is illuminated. Sucks after spending 8 K in other repairs on this car last year. You would think once you get the car almost paid off you could enjoy it for a while without a continuing large expense. Not happening
2003 Mercedes-Benz S55 AMG 86,500 mi,
ABC,,,,leaks fluid
2004 Mercedes-Benz S55 AMG 65,000 mi,
Replaced the hydraulic pump
2001 Mercedes-Benz S55 AMG 10,900 mi,
active body control light continues to come on have owned it for only 3 months
2004 Mercedes-Benz S55 AMG 96,543 mi,
Started leaking fluid and then dropped too low to drive in 2 days
2001 Mercedes-Benz S55 AMG 86,000 mi,
car dfoesnt raise
2002 Mercedes-Benz S55 AMG 78,000 mi,
The container cap pupped out (or at least that is what I noticed when I looked under the hood) and most of the fluid had shut out all over my drive way, that is after my wife got home!
2002 Mercedes-Benz S55 AMG 128,999 mi,
struts leak, ABC light comes on $2900 to fix
In the shop, replaced the pump but it still go down. But after a while it rise up.
2001 Mercedes-Benz S55 AMG 115,000 mi,
ABC Pump failure
2001 Mercedes-Benz S55 AMG 115,000 mi,
I had the ABC pump replaced twice as well as some of the hoses and the ABC notification continues to come on whenever the suspension rocks. Mercedes should do a recall on this system. My auto shop told me recently (the same shop that replaced it twice) I need to replace my ABC pump. Does this ever end?
2001 Mercedes-Benz S55 AMG 115,000 mi,
s55 -replaced a switch in ABC, drained ABC and happening again now in front. Dealership said it would probably happen again and that this is a known problem with a repair memo out but has no recall.
2006 Mercedes-Benz S55 AMG 58,025 mi,
Back from a trip thought there was steam coming from under hood. Pop hood & fluid was spewing from the ABC reservoir cap