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S-Class (W221) 2007-2013: S 320 CDI, S 350, S 450, S 500, S 550, S 420 CDI, S 600

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Old May 27, 2022 | 07:55 PM
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s550hollywood
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What Is This ?
Anyone happen to know what this is? It's low of fluid but I'm not sure what type of fluid it needs. This is the M278 engine on a 2013 S550.

Power Steering Perhaps?



Last edited by s550hollywood; May 27, 2022 at 07:56 PM. Reason: left out make of car
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Old May 27, 2022 | 08:11 PM
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2003 S55 (SOLD) , 2012 S550
Thats the Power Steering Fluid Reservoir

Uses Pentosin CHF 11S Fluid.

Every 2 Years i suck out as much as i can and fill it with new fluid. Then start the engine and go lock to lock a few times and then check the level

Good luck.
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Old May 27, 2022 | 08:15 PM
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Originally Posted by PillDrive
Thats the Power Steering Fluid Reservoir

Uses Pentosin CHF 11S Fluid.

Every 2 Years i suck out as much as i can and fill it with new fluid. Then start the engine and go lock to lock a few times and then check the level

Good luck.
What is lock to lock a few times?
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Old May 27, 2022 | 08:17 PM
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2003 S55 (SOLD) , 2012 S550
Turn the steering wheel all the way left and then right a few times
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