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New 2026 Grand Design Lineage Series M 25TK

Motor Home Class C - Diesel

Stock #52134

Thurmont, MD

1 of 3

MSRP Price: $234,665

Payments From: $1,511 /mo.

Sleeps 3
1 Slides
Bunk Over Cab

Rear Twin

26ft Long
HARBOR LOFT

See All Specs

Specifications

Sleeps	3	Slides	1
Length	25 ft 8 in	Ext Width	7 ft 11 in
Ext Height	11 ft 5 in	Int Height	6 ft 8 in
Interior Color	HARBOR LOFT	Exterior Color	WHITE
GVWR	12125 lbs	Fresh Water Capacity	36 gals
Grey Water Capacity	30 gals	Black Water Capacity	30 gals
Tire Size	LT215/85 R16DRW	Furnace BTU	20000 btu
Fuel Type	Diesel	Engine	Twin Turbo 2.0L Inline 4 Cylinder
Chassis	Mercedes-Benz Sprinter 4500	Horsepower	208 hp
Fuel Capacity	24.5 gals	Wheelbase	170 in
Number Of Bunks	1	Available Beds	King
Torque	332 ft-lb	Refrigerator Type	12V
Refrigerator Size	10 cu ft	Shower Size	24" x 34"
Number of Awnings	1	Axle Weight Front	4630 lbs
Axle Weight Rear	7934 lbs	LP Tank Capacity	20.30 lbs.
Water Heater Type	Tankless	AC BTU	15000 btu
TV Info	LR 32" 12V LED Smart TV, BR 32" 12V LED Smart TV	Awning Info	16'
Gross Combined Weight	15249 lbs	Shower Type	Standard
VIN	343188

Description

Grand Design Lineage Series M Class C diesel motorhome 25TK highlights:

10 cu. Refrigerator
16' Awning
Full Bath
Power Theater Seating
Pantry

Perfect for couples or families who love to travel in style, this motorhome has everything you wish for in a coach. The rear twin beds convert to a king-sized bed, providing a spacious and comfortable sleeping area for two. The full bathroom is equipped with everything you need for a comfortable stay, providing a convenient spot to freshen up after a long day of exploring. The kitchen is equipped with a 10 cu refrigerator for ample storage, a microwave, and a two-burner cooktop for trying out any trending recipe. In addition, the pantry provides more storage for food and cookware.The 32” smart TVs in the bedroom and living room provide endless entertainment options, while the power seating ensures comfortable viewing angles. The bunk over the cab provides additional sleeping space for kids or adults, and the exterior TV offers an ideal spot to enjoy your favorite shows or sports teams while outdoors.

Grand Design's first motorized coach, the Lineage Series M is coming to you with luxurious features at a great value. This Class C diesel motorhome sits on a Mercedes-Benz sprinter chassis for quality and performance you can trust. True to Grand Design's foundation, the Lineage includes interior comforts, durable construction, innovative features, and attention to detail. The Series M Package includes natural teak wood grain, a Lineage Suspension Package, and more. There is also a Blackout Package with black aluminum wheels, a Chromeout Package with chrome aluminum wheels, plus additional packages to enhance your travel experience!

Options:

BLACK OUT PKG
HARBOR LOFT ULTRA FABRIC SOFT TOUCH INT PKG
POWER THEATRE SEATING
SERIES M GRAPHICS
SERIES M PACKAGE
WHITE FBP

Relax.Explore.LIVE!

Features

Standard Features (2026)

Frame & Chassis

Mercedes-Benz® Sprinter 4500 Cab Chassis with 170" Wheelbase
GVWR 12,125 lbs. / GCWR 15,250 lbs.
2.0 Ltr Inline 4-Cylinder High Output TwinTurbo Diesel (208HP/332lb-ft)
9G-TRONIC Automatic Transmission / Rear Wheel Drive
Alternator 14V 280A
Driver/Passenger HeadRest Safe (permanent install)
Comfort Package
Driver Convenience Package
Power Windows & Door Locks w/ Multiple Key FABs
MBUX Multimedia System w/10.25 touchscreen (AM/FM, Apple® CarPlay™ / Android® Auto™)
Comfort Plus Package
Thermotronic Automatic Climate Control
Multifunctional Leather Steering Wheel (Heated, Adjustable - Angle)
D/P Seats - Swivel, Heated, Power, Arm Rests, Storage Pockets and Lumbar Support
D/P Door Mounted Assist Handles
115V Socket / USB-C Socket 5V / 12V Outlet Driver Seat Base
Active Brake Assist
Crosswind Assist
Attention Assist
Hill Start Assist
Fog Lamps with cornering light function
High Beam Assist
LED Tail, Brake, Marker, Turn and Backup Lights
LED High Performance headlamps
Dual Chassis Battery 12V 92AH 850A (w/disconnect)
Jump Start Terminal
Electronic Stability Program (ESP)
Acoustic Package
Park brake lever, folding
Winter Package Plus
Wet Wiper System / Rain Sensor
Emergency Call System (ECALL)
Heated & Electrically Adjustable Exterior Mirrors
Dashboard Charging Package
Front Cup Holders
Outside Temperature Gauge
215/85R16 All-Season Tires
Tire Pressure Monitoring Lamp (TPMS x 6 tires)
Front & Rear Mudflaps
Axle Ratio 4,727
Cockpit Privacy Shades (Windshield, Driver & Passenger)
Fiberglass Running Boards w/ traction tread and Diamond Shield® Paint Protection
Twin-Turbo 2.0 Ltr. Inline 4 Cyl

Construction

MORryde® Tubular Steel Chassis Halo Upfit
Aluminum Exterior Luggage Doors (Side Swing & Key Alike)
Heavy Gauge Aluminum Framed Sidewall, Roof and Floor - Laminated w/ Block Foam Insulation
Exterior Sidewall - Talon Sheet Glass w/ Azdel OnBoard Composite
Interior Sidewall - Composite Elk Board w/ Decorative Wallboard
Exterior Roof - Textured Fiberglass w/ Titan Gasket Seal System / Rain Gutters
Interior Roof - Soft Touch Ceilings w/ 1 piece Elkboard
Aluminum Skinned Slideroom End Walls w/ Windows
Rigid HVAC Ductwork Throughout
Dual Pane European Acrylic Windows w/ Integrated Screen, Privacy Shade & Black Trim Kit
European Entry Door (Dual Latch, Poly Window, Integrated Shade, Side Slide Screen Door)
Aluminum European Power Entry Step
Rotocast Storage Compartments w/ timed Lighting
Lippert SlimRack® Slide-Out
Steel Reinforced, Insulated, Fiberglass Wingwalls w/ Diamond Shield® Paint Protection
12V (DC) w/ Spyder Controls DC Distribution panel & 120V (AC) harnesses
SharkBite Evo Pex Push2Connect Plumbing System (Max SS braided shut offs)
Aluminum Roof Sport Rack
One piece Eternabond Slideout Roof
Steel Stepwell / Battery Box with Temp Sensor
Aluminum Framed Interior Walls
3500lbs Tow Hitch w/ 7 Way Round & 4 Way Flat

Exterior

Fiberglass Front Cap w/ Diamond Shield® Paint Protection
Front Cap Window UV reflective film & Power Shade w/ Reflective Material
Fiberglass Front Rear Cap
Steel Reinforced Fiberglass Running Boards w/ step treads
Blackout LED Marker, Brake & Tail Lights
Girard Armless Awning w/ Wind Sensor
Slideout Topper Awning
Rubber Entry Assist Handle
Aluminum Exterior Roofline Sport Rail
Quick Connect LP Connection Compartment
Aluminum Power Entrance Step
40" Exterior 12V LED Smart TV Compartment w/ GFCI Receptacle & HDMI Outlet
Rockford Fosgate Exterior Sound System w/ Marine Speakers
Lighted Exterior Belt Rail
D/P Side and Back Up Cameras
Lippert On-The-Go™ Ladder Mounting Bracket

Interior

Entry Assist Handle
Natural Teak Wood Grain Cabinetry
Aluminum Framed Interior Walls, Bed Base and Cabinetry (select locations)
Technoform EPP
Push/Lock Cabinet Doors Latches w/ Soft Close Door & Drawers (Hidden Hinges)
Solid Maple Dovetail Drawer Boxes w/ Soft Close Ball Bearing Drawer Guides
Shaw Commercial Grade Vinyl Flooring
Soft-Touch Padded Ceiling (Including Sideout)
Square LED Ceiling Lights
32" 12V LED Smart TV (Living Room & Bedroom)
Rockford Fosgate Interior Sound System, Square Magnetic Speakers & Powered Subwoofer
4000K Interior LED Lighting Package (Square / Strip)
COBRA (Cab Over Bunk Ram Air)
Entry Step Battery Compartment
Multiple Charging Ports (USB, USB-c, 120V)
Molded front overhead bunk with Lights, Chargers, Privacy Curtain and A/C
Power Theatre Seating w/ Ratcheting Head Rests, Power Recliners and Dual Composite Sofa Tables
Rear Wardrobe
Front Bunk Ladder

Kitchen

10 Cu/Ft 12V 3 Door Refrigerator
2 Burner Stove w/ Glass Cover and Overhead Range Hood
Air Fryer / Convection Microwave Oven
Solid Surface Kitchen Countertop w/ flip up extension
Matte Black pull out Kitchen Faucet
MaxxAir® Power Vent with Built-In Rain Cover
Stainless Steel Sink w/ countertop mounted glass washer & Cutting Board
Ultra Leather Package
Theater Seating or Dinette
Cockpit Seating
Headrest Safe

Bedroom

70"x 80" King Bed by Indratech (Reinforced Edges, Medium Memory Foam)
Under-Bed Storage
32" LED Smart TV
LED Reading Lights
USB Charging Ports
Privacy Curtain

Bathroom

Custom Shower Surround and Pan w/Linear Slot Drain, SeaDek Pad, Lighted Skylight-Shower Dome
Matte Black Bathroom Faucet and Shower Tower
Matte Black Retractable Shower Door
Solid Surface Lav Countertop w/ Undermount Stainless Sink
Porcelain Toilet
Matte Black Bathroom Harwards Accessory Package
12V Power Vent

Utilities

Firefly Integrations® Touch Screen Command Center, Bluetooth® Switches & Smart Phone App (Global)
Titan Aluminum 4-Point Hydraulic Leveling Jacks
Battery Disconnects (Entry & Battery Service)
1,800 Watt Xantrax Pure Sine Wave Inverter
4500kW NPS® LP Generator with Auto Generator Start Capabilities
ATG Designed Gree A/C System (Ducted 15KBTU AC w/ 12K Heat Pump, Soft Start & Dehumidifier
Linear Slot Diffusers, RV Airflow Package, Custom Return Air Plenum and Insulated Ducting
Truma® Aqua Go Comfort™ On-Demand Water Heater
Utility Center (Water Management Valve, Exterior Shower, Cable TV Hookup, Black Tank Flush)
SureLevel® Tank Level Monitoring System
12V Water Pump (4 gallons per minute)
12V Heat Pads (Fresh, Gray & Black Tanks)
Carbon-Monoxide, LP/ Smoke Detectors & Fire Extinguisher
Temp sensors (Battery Compartment, Interior, Exterior)
(2) 130Amp/HR Lithionics Batteries
30 Amp Electrical Service w/ Southwire Transfer Switch
Kisae DC-DC Charger / Solar Controller
StarLink Satellite Internet
(3) 180 watt (600 w Total) Merlin Solar Panels with 30-Amp Controller

Series M Package

Mercedes Benz Sprinter 4500 2WD
Natural Teak Wood Grain
Suspension Package
StarLink Internet
SafeRide RV Roadside Assistance
RVIA Seal

Ultra Leather Package

Apex Theater Seating or Dinette Booth w/ Drawers & Dream Dinette Bracket
Cockpit Seating
HeadRest Safe D/P

Blackout Package

Black Aluminum Wheels
Black Exhaust Tip
Black Logo Letters

Suspension Package

Helwig Helper Springs
Bilstein Shocks

Chromeout Package

Chrome Aluminum Wheels
Stainless Exhaust Tip
Chrome Logo Letters

See us for a complete list of features and available options!

All standard features and specifications are subject to change.

All warranty info is typically reserved for new units and is subject to specific terms and conditions. See us for more details.

Due to the current environment, our features and options are subject to change due to material availability.

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New 2026 Grand Design Lineage Series M 25TK

25TK Floorplan

Specifications

Description

Features