Our Volkswagen Passat climate control dash light went out.
To change the bulb turn the fan dial to two. Pull the knob with strong fingers or a padded pliers.
Find a 2 mm rubber hose from windshield washer tubing or vacuum hose. Push the tube over the bulb and pull out the bulb.
Put the new bulb in the tubing loosely. Use a toothpick without the tip to push the new bulb into position.