2018 Cornerstone


You deserve the ultimate luxury—and that’s exactly what the Cornerstone delivers. With power, opulence and new features such as passive tag axle steering, Collision Mitigation, and electronic stability control, you’ll quickly see how it’s easy to revel in luxury in this motorcoach.

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Ward = wardrobe

Lav = bathroom sink

Med = medicine cabinet

Ohc = overhead cabinets

Fridge = refrigerator

Micro = microwave

Exterior Graphics

Standards & Options


Chassis Spartan K3 raised rail chassis
Engine Cummins 15 liter ISX turbocharged 605HP engine 1,950 lb. ft. torque at 1,200 RPM
Transmission Allison 4000 MH 6-speed transmission
Engine Block Heater 1,500 watt engine block heater
Front Suspension Reyco Granning IFS independent front air suspension
Front Axle Reyco Granning IFS independent 20,000 lb front axle and air suspension
Rear Axle Dana rear axle 20,000-lb., tag axle 14,000-lb.
Rear Axle Ratio 4.30 rear axle ratio
Hitch 20,000-lb. hitch with 7/4-pin plug
Leveling System Hadley air leveling system
Radiator Side-mounted radiator
Braking System All-wheel ABS disc brakes
Engine Brake Three-stage engine brake
Traction Control Automatic traction control
Shocks Bilstein shocks - 60MM front & 46MM on rear/tag
Fuel Tank 150-gal. fuel tank (dual fill)
DEF Tank Dual DEF fill 15 gallon
Tires Michelin 365/70R 22.5" tires (front) and 315/80R 22.5" tires (rear)
Turning Radius 55-degree turning radius
Chassis Battery Chassis batteries (2) 12 volt
Alternator 210-amp alternator
Air Connection Remote air connection
Rear Suspension Reyco Granning rear suspension
Tag Axle Tag axle air dump & Reyco Granning Passive Steer Tag Axle


Frame X-Bridge frames welded into chassis frame
Underbelly Enclosed, insulated and heated floor and thermostat controlled heating in storage area
Insulation Insulation with reflective Flexfoil floor (R-33), roof (R-24), sidewalls (R-16), front and rear caps (R-22)
Floor 2" x 4" floor truss construction
Floor Decking 3/4" 7-ply plywood main floor decking
Walls Aluma-Tru Superstructure construction on 12"-16" centers
Exterior Walls 2-1/2" exterior wall with welded tubular aluminum construction and high-gloss, gel-coat fiberglass
Slideouts Flush-mounted electric-powered slideout rooms with VegaTouch control
Roof One-piece fiberglass roof with 3/8" plywood decking and 4" arched aluminum roof truss
Front Cap Steel-reinforced front cap and windshield frame

Heat, AC, Water & Power

Propane All electric coach
Heating System Aqua-Hot 450 diesel hydronic water and heating system with in-floor heat throughout
Air Conditioning 15,000-BTU low profile A/Cs (3) with heat pumps and roof to ground condensation drain tubes
Electrical Hookup 50-amp power cord with electric reel
Generator Onan 12,500-watt diesel generator with auto gen start, on powered slide-out tray
Inverter (2) 3,000 watt pure sine wave inverter
Batteries L16 AGM batteries (4), (6v/390 amp hrs. ea.)
Power Management Premium surge protector transfer switch
Water Hose w/ Electric Reel Water hose with electric reel
Black Holding Tank Sprayer Black holding tank sprayer
Black Tank Management Thetford macerator holding tank dump system with electric gate valves, & manual back-up system
Water Monitoring SeeLevel tank monitoring system
Water Filtration City and tank water filtration system
Winterization Drain System Winterizing drain system
Tank Vents 360 Siphon tank vent(s)


Exterior 3M front protective film mask
Headlights LED high and low beam headlights
LED Fog Lights LED fog lights
Daytime Running Lights Daytime running lights
LED Lights LED marker and turn lights the full length of the coach
LED Docking Lights LED docking lights
Accent Lights LED accent lights on underside of slideout rooms curbside
Third Brake Light Third Brake Light
Keypad Handle Lighted grab handle with keypad system
Keyless Fob Keyless entry with key fob
Entrance Steps Deluxe concealed entry step / Lighted Entegra step
Entrance Door Aire-Secure travel locks for all pocket doors
Door Awning Girard power entrance door awning with LED lights
Window Awnings Girard Ultra window shade and slide-out awnings
Patio Awnings Roof mounted Girard Vision dual pitched patio awnings with LED lights
Mirrors Chrome, heated, remote control, side-view mirrows with blind-spot indicators
Windows Frameless, tinted, dual-pane, safety-glass windows
Exterior Entertainment Exterior 40" Samsung LED HDTV on TV bracket with extend, tilt and swivel arm with Samsung sound bar
Utility Center Exterior utility center, heated and enclosed with system monitor panel
Cargo Features Powered slideout cargo trays (2)
Satellite Dish Winegard in-motion satellite dome with prep for Trav'ler satellite dish
TV Antenna Winegard Rayzar automatic powered TV antenna
Engine Door Power engine door
Rear Mudflap Full-width rear mudflap, with chrome "Cornerstone" nameplate


Flooring Powered flush stepwell cover
Visors & Privacy Shade Powered front sun visors and privacy shade
Windshield Ultra-Vision one-piece wrap-around tinted windshield
Driver / Passenger Seats Air cooled, 6-way power, lumbar, heated, leather driver and passenger seats with integrated 3-point safety belts
Steering Wheel VIP, wood-grain, leather-wrapped, tilt and telescoping steering wheel with integrated controls for radio, cruise, and wipers
Monitoring System(s) Spartan Message Center with LCD display featuring: odometer, tachometer, fuel economy, fuel remaining, outside air temp., coolant temp., engine oil temp. and pressure, transmission temp., turbo boost pressure, air pressure, trip meter, speed and voltage
Infotainment System(s) All-glass paneled, dual 9" capacitive touchscreen in-dash infotainment center with Rand McNally RV navigation, Bluetooth, Sirius XM, AM/FM tuner, integrated camera control, house mode whole coach audio distribution, and integrated VegaTouch coach control
Sound System JBL premium audio sound system with speakers, amplifier, and subwoofer
Leveling System Automatic hydraulic leveling jack system
Power Features Battery boost system
Pedals Powered adjustable foot pedals
Cameras Color "Total Vision" rear camera and digital side cameras
Additional Amenities Chrome, LED lit cupholders and three dual USB ports
Trip Management System


Lighting System VegaTouch pad system, for complete integration of coach controls
Lighting LED recessed 12V lighting
Flooring High Gloss 12" x 24" porcelain tile with granite inlay design
Window Treatments Powered solar day and black out night shades
Television - Living Room Samsung 50" 4K UHDTV
Television - Front Overhead Samsung 32" LED HDTV
Sound - Living Room Bose SoundTouch 300 sound system
DVD Systems Blu-ray players in living area & bedroom
Furniture Leather hide-a-bed(s) (N/A in 45B and 45Y)
Washer/Dryer Stacked washer and dryer
Central Vacuuming System Central vacuum system
Additional Storage In-step storage with pull-out tray
Electric Fireplace LED lit 1,400 watt electric fireplace standard (45B, 45Y) Optional with desk and TV lift option (45A, 45X)


Kitchen Countertops LED lit quartz countertops with integrated stainless steel sink
Cabinet Extension Pullout countertop extension with drawers
Cutting Board Cutting board
Silverware Drawer Silverware drawer
Waste Basket Large deep drawer with waste basket
Dishwasher Dishwasher with wood raised panel door front
Cooktop RV Chef Collection Furrion induction cooktop
Microwave Whirlpool Gold 1.9 cu. ft. convection microwave oven
Refrigerator Whirlpool residential refrigerator with ice maker and water dispenser
Kitchen Backsplash Porcelain tile backsplash with glass design inlays and a ceramic border


Television Samsung 32" LED HDTV
Sound Samsung sound bar
Bedroom Mattress / Bedding Select Comfort Sleep Number king size mattress
Ceiling Fan Ceiling fan
Bedroom Wardrobe Spacious cedar-lined wardrobe


Bathroom Countertop(s) LED lit quartz countertop(s) with integrated sink(s)
Toilet Thetford Tecma china toilets with push button flush (45A, 45F, 45W) / Thetford china toilets with push button flush and Tecma in master bath, and Aria in stool room (45B) / Thetford Aria china toilet with push button flush (45X, 45Y)
Bathroom Shower Door Frameless clear glass shower door
Bathroom Shower Porcelain tiled shower walls and floor with skylight
Bathroom Ventilation Power vent and skylight


Security System Security system with glass shatter sensors
Lights Motion sensor security lights (2)
Smoke Alarm Smoke alarm
Carbon Monoxide Detector Carbon monoxide alarm
Propane Alarm
Security Safe Security safe
Collision Mitigation En-telligent Collision Mitigation System equipped with Collision Warning System, Adaptive Cruise Control, Collision Mitigation System, & Electronic Stability Control
Blind Spot Monitoring En-telligent Blind Spot Monitoring System, tuned to detect objects within the lane of traffic on either side of the vehicle


Canadian Standards Optional
Fireplace LED lit 1,400 watt electric fireplace standard (45B, 45Y)
Dishwasher Drawer Standard
Dinette Leather dinette booth (45A, 45B, 45F, 45W, and 45Y)
Dinette Option 2 Dinette Booth (45X)
Freestanding Table Option 1 Freestanding table with 4 chairs (45A, 45B, 45F, 45W, and 45Y)
Freestanding Table Option 2 Freestanding table with 4 chairs, hide-a-bed, and curbside sofa (45X)
Satellite Dish - US Winegard Trav'ler satellite dish - DIRECTV
Satellite Dish - CA Winegard Trav'ler satellite dish - Shaw Direct
Solar Solar panels (Dual-100 watt) with Morningstar SunSaver Duo solar panel charge controller
Freezer Exterior Freezer
Theater Seating Theater seating with power recliners and fixed center console
Desk Desk with 50" TV lift, fireplace, and hide-a-bed (45A and 45X)
WiFi Extender Antenna WiFi Extender Antenna (4G LTE)
Front Overhead TV Standard
Central Vacuum System Standard

Décor Options

Entegra Coach peace of mind

2 years

2-year warranty and 3-year roadside assistance

At Entegra Coach, excellence doesn’t end with our stunning interiors and superior craftsmanship. We back each luxury coach with the industry’s highest level of service—including a 2-year warranty and 3-year roadside assistance.

2-year warranty details

3-year roadside assistance details


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