Does the intercooler reservoir in a 2022 LDV T60 Max need to be full?

The coolant reservoir tank on your intercooler system works as an expansion tank, so it will have a high and low mark somewhere on it so you can keep the coolant at the correct level. It should be between the high and low marks when the engine is cold. Too high and coolant will be lost when the intercooler gets hot; too low and you won’t have enough coolant for the intercooler to work efficiently.

Modern engines are pretty coolant-specific these days, so you need to check your owner’s manual to see precisely what coolant is specified for the intercooler. It may be different to the one for the radiator because of the materials the intercooler is made from. That said, in the case of the LDV, I believe the correct coolant for the intercooler is the standard green type and is also used in the car’s engine cooling system.