Volvo VN 2012 Quick Reference Manual page 20

I-SHIFT TRANSMISSION FEATURES
Gear Selector Movement
The gear selector lock must be depressed to move the gear lever from
the N position.
The gear lever can be moved from the R position to N, back and forth
between the D and M positions, and from the D position to N without
pressing the gear selector lock.
1. Gear Lever
2. Economy/Performance Button (Premium gear selector only)
3. Gear Selector Lock
4. Manual Gear Selection Buttons (Premium gear selector only)
5. Fold Button
Premium Gear Selector Shown
20