The Eberspächer Airtronic M2 D4L (12V) is a powerful and highly efficient diesel air heater engineered to deliver reliable heating performance in demanding marine environments.
Originally designed for mobile applications, this configuration is perfectly suited for boats, yachts, marine cabins, and offshore vessels, where consistent warmth, low noise levels, and fuel efficiency are essential.
With its robust construction and high heating output (up to 4 kW), the D4L provides dependable comfort even in extreme cold and damp sea conditions, making it an ideal year-round onboard heating solution.
The Comfort Installation Kit includes all essential components required for a complete and professional marine installation — from heater unit and fuel system components to exhaust parts, wiring harness, mounting hardware, and installation box — ensuring safe, reliable, and long-term onboard operation.
Key Marine Features
• Quiet and stable operation — ideal for overnight use in marinas and anchorages
• Durable, vibration-resistant, and moisture-resistant construction
• Suitable for humid and cold marine climates
• Precise temperature control with built-in thermostat and adjustable airflow
• Automatic altitude compensation for reliable offshore and high-altitude lake operation
• Ideal for boats, yachts, marine cabins, expedition vessels, and service craft
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 × 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 Bracket / Installation Hardware 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
