Wet cap of steering fluid reservoir.
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2012 P31 C63 Coupe Trackrat, 2019 GLE63S Coupe Beast
Broken cap
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Yes, I did. First, I removed as much of the fluid as I could with a turkey baster. Then I popped off the thick hose that runs across the top of the reservoir. I believe there is one, maybe two bolts securing the reservoir that you need to remove. Next, you have to remove the hose clamps on the inlet and outlet hoses that goes to the reservoir on the right side. It can be messy once you remove the hoses. Installation is the reverse order. Remember to fill the reservoir with the proper fluid (I used pentosin chf 11s) and bleed the air out of the system.