I had read some old posts regarding what is a common issue with the vario roof . Wondering if there is a post reference describing the relay or mico switch responsible for this specific malfunction : When pressing the roof retracting switch the windows go down, the trunk lid opens from the front and tilts back, I can hear and have visually seen the latching mechanism for the roof at the windshield posts uncouple. At that point the pump motor continues to run but the roof will not open. Used to be intermittent but now it no longer functions at all, so basically a roadster hard top with only 30K on it. Have to give Kudos to the brilliant designers who hopefully are no longer employed at Mercedes Is there any where on this forum where I can find what relay of the many that would cause this issue ?

Hello and welcome to the forum! I'm attaching a link to our site's DIY tech articles on the R170 platform. There are several articles detailing the vario roof - hopefully one of them will be useful to you to troubleshoot. Hope this helps and best of luck!

Mercedes-Benz SLK-Class R170 (1998-2004) Technical Articles ? Pelican Parts