I've searched & searched, and there are conflicting info regarding DIY repair on W210 sunroof not opening fully.

I've read:

1. Remove the glass, lube & clean the cables and everything works

2. Remove the glass, bolt down the cover plate with an extra screw

3. Remove the glass, and replace sunroof cables and cover plate


So what is exactly the right method, and exactly what parts (MB part #?) do I need for the job? mine opens about 2" or so and then the motor spins freely and nothing grabs. Thankfully it will close though.

__________________
Current cars:
2001 MB E55 AMG
2003 Honda S2000
2000 Honda CRV

Gone but not forgotten:
2004 BMW 325i 5sp sport
1999 BMW 540i sport
1997 MB E420
1995 BMW M3 coupe