Join Date: May 2010
Vehicle: 2005 SLK 55; 2005 SLK 350
Other Toys: Several past R170's
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I've been collecting details on the R170 roof for a while, and the biggest mystery to me is the aluminum block, the relief valves inside it, and the two solenoids. Your findings are of particular interest to me, and much appreciated.
If you could, please let us know which solenoid failed, and what specific symptom resulted. Also, do you know if your solenoid fail electrically? Or mechanically?
The job of the solenoids, as I see it, is to switch hydraulic pressure to the appropriate lines at the appropriate times. So a failed solenoid would (might?) result in unexpected pressure (high and low) developing at unexpected places and times. We're you able to discern where and when?