SL-Class (R230) 2003 -- 2012: Discussion on the SL500, SL550, SL600

SL/R230: Front lock cylinder leaking

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Old Mar 16, 2025 | 04:25 PM
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2013 Porsche 911 Carrera 4S, 2004 SL55, 2012 Lexus IS250, 2021 Toyota Highlander
Front lock cylinder leaking

I got the bubbles on the right side window on the headliner and I'm guessing that it's the front lock cylinder that is leaking. What I'm struggling finding information on is how that lock leaks right above the window. From what I can tell, it's a long connection from the cylinder to the pump in the trunk. My question is, does the line from the cylinder go from both sides or the right side to the pump? I only see a leak on the right side.
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Old Mar 16, 2025 | 07:19 PM
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2004 SL500AMG, 2003 SL500 USA
The front latch cylinder is toward the middle above the windshield. An inner cylinder seal breaks down and leaks. Fluid travels along hydraulic lines and/or the upper side of the fiberglass headliner to the right. You should replace the seal or have someone to rebuild the cylinder now. Otherwise, fluid will ripple the seal above the window.
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Old Mar 16, 2025 | 10:31 PM
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Ah... That's what I needed to know. I thought I was missing some kind of connection over the side window.
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