A modern Diesel engine is extremely critical in terms of the fuel being used, make sure you use the correct Euro spec and not just any diesel pump on the forecourt. Repair bills on these engines will make your eyes water and if you use the wrong fuel it won’t be covered under warranty.
If you’ve got an old wreck of a car, filling to 90% with garage fuel and topping off the rest with JetA1 might be worth trying.