I have a 2014 truck with an Eberspacher (Espar) Airtronic D2 diesel heater. Data plate says reference 25 2069. The wiring loom has a white oblong plug with 5 pins to go into the module. Which model of Eberspacher controller will work with this please?

If your Eberspacher D2L heater data plate has H-Kit (this will be writtent vertically in one corner) you can use one of the Eberspacher (Espar) Easystart Controllers
EasyStart Select - https://www.butlertechnik.com/item/Eberspacher/Easy-start-Select-controller-Airtronic-or-Hydronic-heater-221000341300/6SE

EasyStart 7 Day Timer - https://www.butlertechnik.com/item/Eberspacher/heater-Easystart-7-day-timer-221000341500/6SH

If your heater data plate DOES NOT have H-Kit you can use one of the following Eberspacher controllers:
Eberspacher EasyStart T Timer 7 day with diagnostic 12v or 24v - https://www.butlertechnik.com/item/Eberspacher/Easy-Start-T-7-Day-Timer-with-diagnostic-12v-24v-221000328800/54L

Eberspacher Airtronic 802 Modulator Controller - https://www.butlertechnik.com/item/Eberspacher/Airtronic-802-Modulator-Controller-for-Airtronic-D2-D4-S2-M2-80210003/62W