How do you replace a timing belt on a Volvo s80 T6?

To replace the timing belt on a Volvo S80 T6, first, ensure the engine is cool and disconnect the battery. Remove the necessary components such as the engine cover, accessory belts, and any obstructions to access the timing belt. Align the timing marks on the crankshaft and camshaft, then remove the old timing belt and replace it with the new one, ensuring proper tension and alignment. Finally, reassemble all components, double-check everything, and reconnect the battery before starting the engine.