1+ Motor and anchorage  
2+ .Docking and proximity switch  
3+ Motor mounting bracket  
4+ Rail  
5+ Rail seal  
6+ Torx head screw  
7+ Plain washer  
8+ Setscrew  
9+ Spring washer  
10+ Washer  
11+ A-post bracket  
12+ Cantrail bracket  
13+ Cantrail bracket  

The part numbers in the assembly image below relate to the product number in the table. Clicking on the part number will open up the relevant part details.