Function of Optional Switches...........................................................................................58 CAB CLIMATE CONTROL.................................................................................................63 LIGHT CONTROL PANEL..................................................................................................65 LOWER CONSOLE PANEL ................................................................................................66 STEERING COLUMN..........................................................................................................67 Combination Starter and Electrical Switch........................................................................67 Steering Wheel Adjustment...............................................................................................67 Turn Signal Lever ..............................................................................................................67 Stalk Switch ( Co-Pilot® Only).........................................................................................70 FLOOR PEDALS ..................................................................................................................72 MISCELLANEOUS CONTROLS........................................................................................73 Dome Light........................................................................................................................73 Air Horn.............................................................................................................................74 Accessory Power Outlets...................................................................................................74 OPERATION............................................................................................................................76 BEFORE OPERATING THE VEHICLE..............................................................................76 Driver’s Daily Walk-Around Inspection............................................................................76 New Vehicle Break-In........................................................................................................78 WINDSHIELD WASHER RESERVOIR..............................................................................80 HOOD OPERATION.............................................................................................................81 Opening the Hood..............................................................................................................81 Closing the Hood ...............................................................................................................82 Locking the Hood ..............................................................................................................82 HOSE TENDERS..................................................................................................................83 DOORS..................................................................................................................................84 Standard Door Panel ..........................................................................................................84 Locking the Cab Door........................................................................................................86 Power Window Regulators ................................................................................................86 REMOTE KEYLESS ENTRY — (OPTIONAL)..................................................................87 Transmitter Operations ......................................................................................................88 Battery Replacement..........................................................................................................89 MIRROR BREAKAWAY STRUT (IF EQUIPPED).............................................................92 MACK ENGINE INFORMATION.......................................................................................93 Precautions and Warnings..................................................................................................93 Engine Model Designations...............................................................................................94 MACK POWERLEASH™ENGINE BRAKE (IF EQUIPPED)..........................................94 Engine Brake Switch..........................................................................................................96 PowerLeash+ Mode ...........................................................................................................97 Grade Gripper (If Equipped)............................................................................................100 How the Engine Brake is Activated.................................................................................102 Cruise Control with the MACK PowerLeash™Engine Brake .......................................103 ON THE ROAD WITH THE MACK POWERLEASH™ENGINE BRAKE ...................104 Over Flat Terrain..............................................................................................................105 Descending a Grade.........................................................................................................106 On Slippery Road Surfaces..............................................................................................108