In the UAE, the terms "D+" and "D-" specifically refer to the manual shift function within the automatic transmission's Drive (D) mode, allowing you to manually select higher or lower gears. This feature, standard in most modern automatics like the GCC-spec Toyota Land Cruiser or Nissan Patrol, is crucial for adapting to local driving conditions. You engage it by moving the gear lever from 'D' to a separate gate marked with '+' and '-', or by using paddle shifters. For instance, use D- (downshift) when climbing Jebel Jais mountain roads or overtaking on the Dubai-Abu Dhabi highway to access more power and torque. Conversely, use D+ (upshift) for steady cruising on Sheikh Zayed Road to improve fuel economy. A key practice here is using a lower gear (via D-) for engine braking during long desert descents to prevent brake fade. Modern transmissions will override unsafe selections. From a cost perspective, using manual mode wisely can impact long-term ownership. For example, aggressive driving in low gear in city traffic can lower fuel efficiency from a potential 9 km/l to around 7 km/l on a Patrol using Special 95, increasing the cost per km. The RTA Dubai's vehicle inspection guidelines emphasize the importance of proper transmission operation for vehicle longevity, while ownership cost analyses often reference data from the Central Bank of the UAE on fuel and maintenance expenses.
- Core function: Manual gear selection within Drive mode for GCC-spec vehicles.
- Primary use case: Downshift (D-) for power on dunes or overtaking; Upshift (D+) for highway fuel efficiency.
- Local benefit: Engine braking on mountain or desert declines protects the conventional brake system.
