252720050000. Designed for campervans, motorhomes, expedition vehicles, service vans, and off-grid installations, the Eberspächer Airtronic D4L (12V) is a powerful, efficient, and quiet diesel air heater built to deliver reliable warmth in all climates. With its robust construction and high heating output, the D4L provides consistent comfort even in extreme cold, making it an ideal year-round heating solution.
The Comfort Installation Kit includes everything needed for a complete and professional setup—from the heater unit and fuel components to the exhaust system, wiring harness, and mounting hardware—ensuring a simple, safe, and reliable installation process.
Key Features
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Heating Capacity: Approx. 1.8 – 4.0 kW, suitable for medium to large interior spaces
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12V Compatibility: Fully optimized for all 12V campervan and vehicle electrical systems
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Diesel-powered heating with optimized combustion for improved fuel efficiency and reduced emissions
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Quiet and stable operation thanks to advanced airflow engineering and noise-reduction design
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Durable, vibration-resistant, moisture-resistant construction—ideal for off-road and mobile environments
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Precise temperature control with built-in thermostat and adjustable airflow
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Automatic altitude compensation for reliable performance in mountainous areas
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Wide range of applications: motorhomes, large camper conversions, overland trucks, boats, and mobile workshops
Airtronic M2 D4L 12V Heater – Package Contents
1 × Airtronic M2 D4L Heater Unit
OEM Code: Not specified
1 × Digital Control Switch
OEM Code: 25.1000.35.2200.0C
1 × 90 mm Hot Air Hose (50 cm)
OEM Code: Not specified
1 × Heater Front Cover
OEM Code: Not specified
1 × Electrical Wiring Harness
OEM Code: 25.2720.80.1100.0A
1 × Fuel Hose (8 meters)
OEM Code: Not specified
1 × Air Intake Pipe (100 cm)
OEM Code: Not specified
2 × Exhaust Pipes (90 cm + 30 cm)
OEM Code: Not specified
1 × Silencer
OEM Code: Not specified
1 × Air Outlet Vent
OEM Code: 22.1000.01.0056.0A
1 × Fuse Kit
OEM Code: 22.9000.30.2720.0A
1 × Automatic Holder / Bracket
OEM Code: 22.1000.50.0300.0D
15 × Plastic Clamps
OEM Code: 22.9000.09.0165.0A
1 × Automatic Mounting Bracket / Hardware
OEM Code: 22.9000.09.0163.0A
1 × Installation Hardware (screws & clamps)
OEM Code: Not specified
1 × Air Intake Grill
OEM Code: Not specified
1 × 90 mm Hose Clamp
OEM Code: Not specified
1 × 1–4 kW Fuel Metering Pump
OEM Code: 22.4553.01
Installation Box
OEM Code: 25.2720.80.0000.0B
Typical Applications
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Campervans and motorhomes
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Large van conversions
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Overland and expedition vehicles
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Service vans and mobile workshops
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Marine cabins and boats
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Off-grid installations and tiny homes