1+ Brake booster  
2+ Bracket  
3+ Recessed pan head screw  
4+ Harness  
5+ Sensor  
6+ Bolt and washer  
7+ Sensor bracket  
8+ Setscrew  
9+ Speed control switch  
10+ Stud  
11+ Nut  
12+ Adaptive cruise control kit  

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.