Metalnerd PD Tool Kit for 2004-2006 TDI engine
1. The red handle "L" pin is for holding the cam at TDC (Top Dead Center).
2. The plain metal "L" pin is to hold tension on the serpentine belt tensioner during the timing belt change.
3. The purple crank lock holds the crank perfectly still at TDC while you are changing the timing belt.
Click here for third party timing belt replacement procedure.