Using the Bosch GWX13-50 angle grinder is quite straightforward. First, make sure the grinder is turned off and unplugged. To change the wheel, just pull the quick - release lever. You don't need any extra tools. Mount the new X - LOCK wheel, and you'll hear a snap when it's properly in place. When using the grinder, hold it firmly with the vibration - control auxiliary handle. Adjust the wheel guard to the working angle that suits you best. You can do this without tools. For maintenance, the service minder brushes will let you know when it's time for some upkeep. Just follow the instructions in the manual. Keep the grinder clean, especially the air intake to ensure proper cooling. When not in use, store it in a dry place. Also, remember that the restart protection is there to prevent accidental startup if the power is interrupted. And if you want to customize settings, use the Bluetooth® connectivity to connect to the Bosch Toolbox app on your device.