2026 Entegra Coach Cornerstone 45B Midnight

2026 Entegra Coach Cornerstone 45B Midnight

Live out your dreams in ultimate luxury in the Cornerstone, Entegra Coach's flagship diesel pusher and the #1 selling coach in the 605HP engine category. Built utilizing unique construction techniques and offering numerous ride and handling upgrades, the Cornerstone is truly the quietest riding, best-handling coach on the market today—period. Premium interior features and materials take this powerful motorhome to the next level. The Cornerstone is the epitome of power meets luxury.

The Cornerstone is built upon the Spartan K3 or Freightliner SL chassis. Both chassis features a Cummins 605HP engine, side-mounted radiator, custom-tuned Koni shocks and the Valid™ Truline air leveling system for a powerful and smooth ride you won't find anywhere else. 

Inside the cockpit, our cab-forward design features a 120-inch windshield, the largest in the industry, for an immersive view of the road. With a heads-up design, the newly updated Safe View dash features a 15-inch digital dash, 15-inch center console infotainment center and tri-pod steering wheel to keep everything at your fingertips while keeping your eyes on the road and hands on the wheel. Heated and cooled Italian leather cockpit seats with massage function will keep you nice and comfortable. At the same time, safety features include a collision mitigation system with blind-spot monitoring and the Delta Mobile Systems® aiDARS™ 1X active 360° surround view system. All these amenities allow the Cornerstone to deliver the best driving experience in the industry.

The Cornerstone's living space offers options in wood, décor, and tile color so you can build the coach of your dreams, regardless of your taste. Luxurious Italian leather furniture throughout, hand-tiled floors, backsplashes and showers, premium residential appliances, and custom-built hardwood cabinetry give the Cornerstone interior an unmatched look and feel.

While the Cornerstone is stunning inside and out, what makes it extraordinary lies beneath the surface. With residential hung-wall construction, 5-inch-thick wood floors, cabinets laid before tile installation and three layers of insulation, the true beauty of the Cornerstone is the incredible quality of its hand-built construction. These construction features add to the quiet ride of the Cornerstone and allow us to offer our customers the best warranty in the industry. With a two-year limited and 5-year structural warranty, you will feel true confidence and security in your Entegra Coach Cornerstone. 

Features May Include:

CHASSIS

• Chassis: Spartan K3 raised-rail chassis
• Engine: Cummins 15 liter X15 turbocharged 605 HP engine with 1,950 lb. ft. torque at 1,150 RPM
• Transmission: Allison 4,000 MH 6-speed transmission
• Radiator: Side-mounted, parallel-airflow radiator
• Alternator: 210 amp alternator
• Engine Block Heater: 1,500W engine block heater
• Engine Brake: Three-stage engine brake
• Rear Axle: Dana rear axle - 20,000 lb. rating
• Braking System: All-wheel ABS disc brakes
• Rear Axle Ratio: 4.30 rear axle ratio
• Tires: Michelin 365/70R 22.5 in. tires (front) and 315/80R 22.5 in. tires (rear)
• Tire Pressure Monitoring: Tire pressure monitoring system (TPMS) with temperature monitoring
• Traction Control: Automatic traction control
• Leveling System: Equalizer™ hydraulic automatic coach leveling
• Air Leveling: Valid™ Truline air leveling system with auxiliary air compressor
• Air Connection: Remote air connection
• Chassis Battery: (2) 12V chassis batteries
• Fuel Tank: 175 gal. fuel tank with dual fills
• DEF Tank: 15 gal. DEF tank with dual fills
• Tow Air Brake System: Spartan Safehaul tow vehicle air brake system
• Hitch: 20,000 lb. hitch with 7-pin plug
• Front Axle: 20,000 lb. rating front axle with independent front suspension, integrated anti-sway bar and custom-tuned shocks.

CONSTRUCTION

• Roof: 4 in. arched aluminum trusses filled with batt insulation and reflective Flexfoil topped with 3/8 in. plywood decking then one-piece fiberglass
• Walls: 2-1/2 in. exterior walls with Aluma-Tru™ welded tubular aluminum studs on 16 in. centers or less, filled with batt and Flexfoil insulation, then covered with high-gloss gelcoat fiberglass (R-16)
• Floor: 2 in. x 4 in. wood trusses on 16 in, centers or less filled with batt and Flexfoil insulation then topped with 3/4 in. 7-ply plywood decking (R-33)
• Frame: X-Bridge™ bracing welded into chassis frame
• Slideouts: Entegra Coach-exclusive ElectraGlide flush-mounted 12V slideout system

HEAT, AC, WATER & POWER

• Heated Tanks: Aqua-Hot heated basement storage
• Generator: Onan 12,500W diesel generator, with automatic start, on powered slide-out tray
• Inverter: Victron 3,000W pure sine wave inverter with LED screen
• Batteries: (4) L16 AGM batteries (6V/390 amp hrs. ea.)
• Solar: (2) 200W solar panels
• Electrical Hookup: 50 amp power cord on electric powered reel
• Transfer Switch: Smart automatic transfer switch with surge protection
• Air Conditioning: (3) 15,000 BTU A/C units with heat pumps and condensation drain system
• Heating System: Aqua-Hot 600D hydronic water and heating system with in-floor heat throughout and engine preheat
• Black Tank Management:Sani-Con" macerator holding tank dump system with power gate valves and manual backup
• Tank Flush: Black tank flush; Grey tank flush
• Tank Assist: Tilt tank dump
• Water Filtration: City and tank water filtration system
• Water Hook-Up: Hot and cold water hook-up in front cap area with 30 ft. quick-disconnect hose
• Water Softner: Water softener prep in driver-side compartment
• Water Hose w/ Electric Reel: Water hose with electric reel

EXTERIOR

• Front/Rear Cap: Insulated front and rear caps (R-24)
• Stainless Steel Accents: Executive Bus Armor 10 in stainless steel trim
• Engine Door: Power rear engine door with manual override
• Patio Awnings: Dual roof-mounted Girard Vision dual-pitched patio awnings with LED lights
• Door Awning: Girard power entrance door awning with LED lights
• Slideout Awnings: Girard Ultra slideout awnings
• Window Awnings: Girard Ultra power window awnings
• Windows: Frameless, dual-pane, tinted, safety-glass windows
• Keypad: Lit grab handle with doorbell and keypad system for keyless entry
• Entertainment: 43 in. Samsung QLED 4K UHD Smart TV with tilt, swivel, and extend adjustment; JBL soundbar with USB port and receptacle
• Mirrors: Blind-spot monitoring indicators in chrome, heated, remote-control side-view mirrors
• Exterior: Diamond Shield™ front protective film mask
• Headlights: Automatic LED high and low beam headlights
• Fog Lights: Halogen fog lights:
• Daytime Running Lights: Automatic daytime running lights
• LED Lights: LED marker lights, tum lights, license plate light, third brake light, accent lights and docking lights
• Accent Lights: LED accent lights under all slideout rooms
• Chrome Accents: LED-lit chrome clearance accent light
• Lights: Porch light and motion sensor security lights
• Rear Mudflap: Mudflap with chrome "Entegra Coach" nameplate
• Satellite Internet: Starlink satellite internet system
• Satellite Dish - US:Winegard" TRAV'LER satellite dish DIRECTV - standard with USA option
• Satellite Dish - CA: Winegard" TRAV'LER Pro satellite dish Shaw TV-standard with CSA option
• Antenna: Winegard Rayzar Automatic powered TV antenna
• Wi-Fi:Winegard WiFiRanger Wi-Fi extender
• Utility Center:Heated exterior utility center with 5 in. LED Firefly" tank monitoring panel
• Cargo Features: (2) power slideout basement storage trays
• Freezer:2.8 cu. ft. exterior refrigerator/freezer on slideout tray
• Baggage Doors: Push-button, power-unlatching baggage doors with LED indicator light
• Exterior Walls: Sikkens custom full-body paint
• Entrance Door: Removable screen on entry door

COCKPIT

• Collision Mitigation: Collision avoidance system with collision warning, adaptive cruise control and electronic stability control
• Additional Amenities: Bergstrom dual-zone HVAC system; Dual USB port and one 12V socket for charging
• Dash: Valid™ 15 in. digital dash with quad core graphics processor, on-board diagnostics and ability to display traditional instrument cluster, 360° camera system or GPS navigation
• Cameras: Delta Mobile Systems aiDARS™ 1X active 360° surround view system with 14 smart radar sensors and 6 HD cameras displayed on digital dash screen
• Infotainment System(s): Valid™ infotainment system with 15 in, touchscreen, Sygic navigation, Bluetooth", Sirius XM™ and AM/FM tuner, integrated camera control, house mode whole-coach audio distribution and integrated Vega Touch coach control
• Side Consoles: 4.3 in. infotainment control touchscreen in passenger console
• Driving Features: E-Z Steer adjustable power steering assist
• Steering Wheel:Leather steering wheel with integrated controls for screen selection, instrument cluster navigation, media source selection, cruise, wipers and Bluetooth" phone functionality
• Steering Column: Power tilt and telescoping steering column
• Sound System: JBL premium audio 11-speaker sound system with amplifier, speakers and DVC subwoofer
• Antenna: All-in-one automotive antenna for AM/FM/Sirius/GPS dash radio system
• Windshield: Ultra-Vision one-piece wrap-around tinted windshield; Rain-sensing windshield wipers
• Driver/Passenger Seats: Heated and cooled leather driver and passenger seats with powered 6-way adjustment, lumbar, recline, footrest and massage functions
• Power Features:Powered driver's window; Powered flush stepwell cover
• Pedals: Powered adjustable brake and accelerator pedals
• Visors & Privacy Shade: Powered front sun visors and privacy shades

INTERIOR

• Electric Fireplace: LED-lit fireplace with 5,000 BTU heating element (45B, 45Z)
• Television - Front Overhead: 32 in. Samsung QLED 4K UHD Smart TV in front overhead
• Command Center: Firefly multiplex system with 10 in. VegaTouch touchscreen for complete integration of coach controls, with remote monitoring and control (mobile app available)
• Switches: Spyder 3.5 in. touchscreen switches throughout
• Television - Living Room: 50 in. Samsung QLED 4K UHD Smart TV
• Sound - Living Room: Bose sound bar with subwoofer and universal remote control
• DVD Systems: Sony Blu-ray™ player
• Furniture: Premium leather Villa furniture
• Flooring: Hand-laid porcelain tiled floors
• Lighting: LED interior lighting
• Ceiling:Decorative ceiling feature with integrated accent lighting
• Window Treatments: Powered solar day and blackout night shades
• Central Vacuuming System: Portable Shark" vacuum cleaner; Dirt Devil central vacuum system with in-wall dust pan
• Interior Doors: Aire-Secure travel locks for all pocket doors
• Bar: Bar area with beverage chiller and rain glass upper cabinet door with LED accent lighting (45R only)
• Cabinetry: Hardwood cabinets and stiles throughout; LED accent lights under slide-out cabinets
• Bunks: Bunks with industry-exclusive 300 lb. capacity each (45R)
• Washer/Dryer: Stackable washer and dryer

KITCHEN

• Window: Window with push out lever operation and screen
• Refrigerator: Stainless steel residential refrigerator
• Cooktop: Induction cooktop with matching wood cover
• Microwave: 1.7 cu. ft. convection microwave with air fryer function
• Dishwasher: Fisher & Paykel dishwasher
• Countertops: Solid-surface countertops with Blanco single-bowl granite sink and dimmable LED accent lighting
• Water Dispenser: Filtered water dispenser at kitchen sink
• Vent: Maxxair power vent exhaust fan with intake and touch screen control
• Drawer GuidesSoft-close dovetail drawers
• Waste Basket: Large, deep drawer for waste basket with easy access trash chute
• Storage: Pantry with pull-out shelves; Slide-out storage tray(s) in overhead cabinet

BEDROOM

• DVD Systems: Sony Blu-ray™ player
• Bed: Personal Comfort A5 king-size mattress; Motion-activated LED lights in bed base
• Television: 43 in. Samsung Crystal UHD Smart TV in bedroom
• Sound: Bose sound bar with universal remote control
• Ceiling Fan: Ceiling fan
• Nightstands: Nightstands with solid-surface tops
• Wardrobe: Automatic light in rear closet

BATHROOM

• Countertop(s): Solid-surface countertops with single sink and dimmable LED accent lighting
• Shower: Porcelain tile shower walls and floor with skylight and frameless glass shower door
• Shower Seat: Teakwood shower seat
• Shower Head: Pivoting shower head and separate hand-held spray wand
• Water Saving System: Aqua View SHOWERMISER™ water saving system
• Toilet: Thetford macerator toilet in main bath; Thetford macerator toilet in mid bath (45D, 45R, 45V); Thetford Aria china toilet in mid bath (458)
• Vent: Maxxair Deluxe power exhaust vent fan with intake

SAFETY

• Carbon Monoxid Detector: Carbon monoxide detector
• Smoke Alarm: Smoke alarm
• Security Safe: Storage safe

OPTIONS

• Chassis: Freightliner SL chassis ILO Spartan K3 chassis
• Theater Seating: Theater seating with power recliners and fixed center console (45R)
• Dinette: Dinette booth ILO free-standing table and chairs (45B, 45D, 45V, 45Z)
• Area Rug: Area rug set for living room and bathroom
• Dishwasher Drawer: Cabinet with two drawers ILO dishwasher
• Headboard: Wood headboard
• Mattress: Sleepmade memory foam mattress
• Exterior Color: Blackout package (includes black American Racing Octane wheels and black stainless steel 10" Executive Bus Armor trim, mirrors, mudflap and badging)
• Satellite Dish: Winegard in-motion satellite dome ILO Winegard TRAV LER
• Satellite Dish - US: Winegard TRAV'LER satellite dish Dish Network ILO DIRECTV
• Canadian Standards: Canadian standards (CSA)
• Media Center 1: Media center with shelf ILO sofa (45D, 45V)
• Media Center 2: Media center with wine cooler ILO sofa (45D, 45V)
• Hide-a-Bed Sofa: Hide-a-bed sofa ILO power reclining sofa (458, 45Z)
• Hide-a-Bed Sofa 2: Hide a bed sofa with end tables ILO power reclining sofa (45B, 45Z)
• Theater Seating Option 2: Theater seating with end tables ILO power reclining sofa (45B, 45Z)
• Hide-a-Bed Sofa 3: Hide-a-bed sofa ILO theater seating with opposing STD sofa (45D,45V)
• Bathroom Sink: Double sink in main bath ILO single sink (45B, 450, 45V, 45Z)
• GPS: Garmin 10-inch RV Navigator GPS system
• Lithium Package: Lithium battery package