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• 2006 Signature 42 CHATEAU

2006 Monaco Signature 31,xxx miles, Indoor Stored, Recent Services

This 2006 Monaco Signature diesel pusher has just 31,xxx miles, and is in unusually good condition due to indoor storage. The Signature designation was the flagship of the Monaco luxury coach line. It has benefitted greatly from dry climate indoor storage. It has been meticulously maintained by the owner. The owner is a commercial pilot/CEO who knows from experience how to properly care for engines and equipment. This coach has never required cosmetic restoration or rehab and presents exceptionally well. It favorably compares to 1 or 2 year old coaches. Adjusted for inflation, this is a million dollar coach in today's dollars. Offered at a fraction of that price.

Upgrades & Enhancements

New tires (Fall 2025).

4K LG OLED television and color display

Color, Wi-Fi-enabled HVAC thermostats. Use wifi and control/monitor from anywhere!

Victron inverter supplied with coach for future lithium battery upgrade.

Engine & Mechanical Condition

600 HP Cummins ISX CM engine

Recently serviced and inspected at an authorized Cummins factory facility

Completed a comprehensive factory 30-point inspection with no recommended repairs or deferred maintenance noted.

Engine oil change, oil filter, and fuel filter.

Full transmission service including filter and fluid exchange

Recent roof reseal as periodic maintenance completed Fall 2025.

Generator maintenance & service done (oil change, air filter, fuel filter.)

This coach is equipped with the highly desirable 600 HP ISX engine. Special note: the engine in this coach is not the later ISX 650HP calibration that had EGR wear concerns. Those engines were first introduced two years later. This distinction is supported by Cummins service data, engine data plate, year model, and recently confirmed by recent factory inspection.

Please be aware of inaccurate claims that conflate this proven, reliable 600 HP engine with later variants. This distinction is important for buyers to separate rumors from facts.

Paint, Body & Storage

Dry climate indoor storage

Near showroom-quality interior and exterior, achieved without repainting, cosmetic manipulation, or cover-ups.

Interior and exterior condition is rated as very good to excellent. No observed paint checking, sun fade, or environmental degradation typical of outdoor-stored coaches.

A Note on Rehabbed Coaches- And Why This Monaco Signature is Superior

This coach has never undergone the process of decay and then rehabilitation. Indoor storage has made the difference. Some older high-end coaches are prepped by dealers only after they have undergone rehabilitation due to prolonged outdoor exposure, excessive humidity, deferred maintenance, or cosmetic decline. Unlike this coach, underlying or hidden issues may exist within the "rehab coaches" due to their history of outdoor exposure or neglect.

This Monaco Signature has never required rehab because it was properly cared for from the start. With this coach, you can discuss its history directly with the owner who knows it systems and history thoroughly.

Why This Coach Stands Out

You are working directly with the owner, who can provide full transparency on service history, upgrades, and inspection results. Maintenance has been proactive and preventative, not reactive. This is not a broker-flipped or cosmetically refreshed unit.

This 2006 Monaco Signature represents a rare combination of:

Low mileage

Indoor storage from new

Verified Cummins factory inspection

Proven engine configuration

Long-term, knowledgeable ownership

It looks, drives, and presents better than many significantly newer coaches, offering confidence, performance, and longevity without the uncertainty and risks that often accompanies restored or rehabbed units.

Premium Features:

1. Low mileage, well maintained, stored indoors.

2. Interior & exterior condition reflect its history of care and indoor storage.

3. Cummins ISX 600HP Diesel Engine w/Allison transmission.*

4. Luxury throughout, top-of-the-line, "Signature class" vehicle.

5. 12,500 Cummins diesel generator.

Hydronic (Aqua-Hot) Heating

This coach is equipped with Aquahot, which circulates heated fluid throughout the coach for even warmth, quiet operation, basement protection, and unlimited hot water benefits that floor-only systems cannot provide. With hydronic heating, there is quiet and luxurious heat in any climate.

Need to do a cold morning engine start? Flip a switch at the driver cockpit and the Aqua-Hot also circulates its hot water through the engine to pre-warm it before starting. Aqua-Hot systems are the "gold standard" in RV heating technology.

Comfort Equipment:

Three Roof A/C's w/Heat Pumps (ducted)

Aqua Hot Heating System

Air Bags / Air Leveling

Leather seats

Air Bed / King size

Large Rear Wardrobe

Lockable Safe

4K OLED TV

Color thermostats with wifi notifications

Individual window awnings

Exterior Equipment:

Full length Girard Awnings (2), plus Window Awnings

Side-Hinged Cargo Doors, locking with keyfob

Cargo area slides (1-motorized)

Power reels for Water & Power Cord

Aluminum Wheels

Engine/Drivetrain

600hp Cummins ISX diesel (pre-dates the later 650hp variant)

Roadmaster Chassis

Tag Axle

Electronic:

Pure Sine Wave Inverter

TV's in Living and Bedroom

Motorized TV in Living area

Keyless entry

Interior:

Cherry cabinets

High end dimmable lighting including accent/rope lights

Tile & carpet

Sofa (passenger side), Desk / Work area (driver side)

Kitchen table w/4 chairs

Residential style refrigerator

Convection Microwave (GE Advantium)

Washer/Dryer

Cockpit:

Power Captains Chairs, Leather seats

Co-Pilot Power Footrest Adjustable Pedals

Rear and Side View Cameras

Aladdin Systems Monitor

VORAD driver assist system

Collision Avoidance System

Engine / Chassis / Exterior

Cummins ISX 600hp Diesel Pusher

Allison 6 speed transmission

Engine Brake (two stage)

Roadmaster Chassis w/ Tag Axle

Traction control

Torque 1,650 ft-lbs. @ 1,200 RPM, Displacement 15.0 liters

Onan 12.5KW Diesel Generator