How do you change drive belt on citroen xantia?

To change the drive belt on a Citroën Xantia, first, ensure the engine is off and cool. Remove any necessary engine covers to access the belt. Loosen the tensioner pulley using a wrench, then carefully slide the old belt off the pulleys. Install the new belt by routing it according to the belt routing diagram, ensuring it sits properly on the pulleys, then re-tighten the tensioner. Finally, check the belt alignment and replace any covers before starting the engine.