Mercedes Benz 500SL Headlight Switch
Mercedes Benz 500sl Headlight Switch: Three Problems You Might Encounter
Your Mercedes Benz 500sl headlight switch is as important as the headlights of your car since both parts ensure your safety while driving. However, just like the headlights, the headlight switch will eventually malfunction and show signs of wearing down. If you start to notice that your headlight switch is acting differently, then you have to do some troubleshooting. Here's a list of the common problems you'd probably encounter:
Noise coming from the headlight switch
There are a number of reasons why your Mercedes Benz 500sl headlight switch is buzzing, clicking, rattling, or making different kinds of noises. One reason is the headlight switch might have come loose from its housing. You should check the screws and tighten them if necessary. Aside from that, inspect the switch and check if some parts have come off. Make sure to place it back on its correct position. Another possible reason is the buildup of dirt between the switch and the fuse. However, if the headlight fuse is tightly sealed, then this means that the switch is already worn out and needs to be replaced.
Headlamps that won't work even when the switch is turned on
When you have already turned on the headlight switch but there's no light coming from the headlamps, the first thing you should check is the voltage from the headlight's fuse. You could use a digital multimeter to check the voltage. If the fuse is working fine, you should inspect the wires behind the headlamp assembly-maybe they're just slightly disconnected. If you found no problem with the connection of the wires, then it's time to remove the headlight switch and test it. Use the digital multimeter again and check if there' voltage coming from the switch. If there's none, then your headlight switch needs to be replaced.
Failure to adjust headlight brightness
Since the headlight switch has different relays that control the low- and high-beam lights, the high-beam light relay might have failed due to corrosion or excess current. This will lead to the inability of the switch to change the beam's brightness. If this is not inspected and repaired immediately, it may affect the low-beam relay and could lead to total failure of the headlamps.