9. How much pressure is in the rear air strut on the E66 when it is stored?
10. List the correct color for the air hoses on the EHC I system:
Left Right 
11. The “Band Mode” is also known as 
and 
12. What operating modes are specific to the Dual Axle EHC system?
13. What is the maximum system pressure on the EHC I system (E39/E53)?
14. What is unique about the rear air struts on the E66?
15. What is the maximum air pressure of the air supply unit on the E53 with Dual Axle Air 
Suspension?
57
Level Control Systems