The Eberspächer Airtronic M2 D4L (24V) is a high-performance diesel air heater engineered for demanding applications including large camper builds, expedition trucks, commercial service vehicles, and marine cabins.
With a powerful heating output of up to 4.0 kW and robust construction, the D4L delivers reliable, consistent warmth even in harsh winter conditions. Its optimized combustion system ensures excellent fuel efficiency, low emissions, and quiet operation — making it ideal for both mobile and marine environments.
The included Comfort Installation Kit provides all essential components required for a complete and professional installation, ensuring a safe, efficient, and long-lasting setup.
Key Features
• Heating Capacity: Approx. 1.8 – 4.0 kW – suitable for medium to large interior spaces
• 24V System Compatibility – ideal for trucks, buses, heavy-duty vehicles, and 24V marine systems
• Optimized diesel combustion for high efficiency and reduced emissions
• Quiet and stable performance with advanced airflow and noise-reduction design
• Rugged, vibration-resistant, and moisture-protected construction
• Precise temperature regulation with built-in thermostat
Airtronic M2 D4L 24V Heater – Package Contents
1 × Airtronic M2 D4L Heater Unit
OEM Code: 252729
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 × Exhaust 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 × Mounting Bracket / Holder
OEM Code: 22.1000.50.0300.0D
15 × Plastic Clamps
OEM Code: 22.9000.09.0165.0A
1 × Mounting Components Set
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
1 × Installation Box
OEM Code: 25.2720.80.0000.0B
Additional Accessories
*1 × Chrome Mounting Bracket
(Part No: 41C0016 / 221050890800)
*1 × Exhaust Through-Hull Flange
(Part No: 292100012023CHC / 1320363A / 9018377A)
*1 × Exhaust Insulation Sleeve
(OEM: 9016230B – 1700 mm × 140 mm)
*1× 24 mm Exhaust Clamps
(OEM: 1320220A)
⚠️ Important Note:
Accessory parts marked with an asterisk (*) are 100% compatible
