- Eberspacher D2L Airtronic External Diesel Space Heater with EasyStart Pro controller for the VW T5 and T6 2003-present. An excellent choice for heating your Volkswagen campervan, complete with an external mounting plate to save storage space inside. This heater operates on diesel fuel directly from your vehicle fuel tank, making it perfect for off-grid adventures, allowing you to keep warm without needing to run the engine.