How do you change the camshaft on vw sharan diesel 1.9 2005?

To change the camshaft on a 2005 VW Sharan diesel 1.9, first ensure the engine is cool and disconnect the battery. Remove the timing belt cover, and then the timing belt itself by aligning the timing marks. Take off the cylinder head by unscrewing the bolts, and then you can carefully remove the old camshaft. Install the new camshaft by reversing the steps, ensuring proper timing and torque specifications are followed during reassembly.