This genuine Eberspacher fuel pipe is exactly the correct item for earlier generation D2 Airtronic heaters. This pipe is used from the Eberspacher fuel dosing pump outlet to the heater inlet. There is however a larger diameter pipe required for the shorter line ( typically up to 1 mtr) between the fuel tank and the fuel pump inlet- please check our eberspacher fuel pipe part number below
https://www.butlertechnik.com/item/Eberspacher/Heater-2mm-ID-Fuel-Line-Black-09031125/6SB