I hardly drive my SL, but recently realized the easy in/out (up/down) function was not working. My service guy checked to see if it was covered under the CPO plan, which it was. However, my curiosity got the best of me. With a little research, I found that the pictured component (worm gear) is what operates the up/down function. I knew the motor was working because I could hear it clicking. I pulled all the happy horse shit out of the way, beginning with the lower dash, black cover (pain in the ass), two screws, all the components attached to it just unclip, OBD plug, & wire harness. Rear cup holder fascia, left side console trim, left side wood trim on dash, the fuse box cover, left side, there is a screw up in there. A few screws drops the knee air bag. No need to unplug the air bag, it will lay there. A this point you'll be looking right at the worm gear. A few allen heads and the worm gear pulls out from the electric motor. The electric motor has an opening that the drive end of the assembly goes into. Very simple, you'll see. I expected to find something broken, but found that the black block that is driven by the worm drive was actually just seated tight against the stop (black arrow in pic). The electric motor does not have enough torque to unseat it. As RussBarnes said, it maybe possible to use leg pressure and maybe hit the steering wheel to jar it loose. To reverse the torque to move that black block off its seat, would really take a lot. Incidentally, when the worm gear is removed, the steering wheel will move up and down by hand. Looking at the two pics, I think you'll get the idea in regards to trying to reverse the torque. I just white lubed everything, put it all back together, all is fine. The picture of the whole assembly is off of Ebay, I did not remove the whole thing, just the worm drive.