Mercedes Benz S320 Mirror
Troubleshooting Your Mercedes-Benz S320 Mirrors
Your Mercedes-Benz S320 mirrors aren't just for primping and checking your appearance out. They actually help improve your safety by giving you greater visibility. If you position them correctly, they can completely eliminate your blind spots. But, you might not be able to appreciate this if you're getting distracted by the glitches from their electrical functions. Here's how you can troubleshoot your electrical side and rear-view mirrors:
Troubleshooting the side mirrors
Your Mercedes-Benz S320 side mirrors are powered by electricity so that you can move it without getting out of the driver's seat. What's more, some side mirrors are also able to heat up and melt ice. If you can't seem to turn on the heating function of your mirrors, then you might need to turn on the rear defroster as well. A lot of models with this feature have been wired to heat up only when the rear defroster is turned on.
Troubleshooting the rear-view mirror
Your Mercedes-Benz S320 rear-view mirror can be adjusted with the help of control switch. It has two motors inside its assembly as well as a circuit that extends all the way to one of your fuse boxes.
To determine whether you need to change the entire assembly or if you need to do some detective work along the circuit, you'll need to turn the ignition switch without starting the engine. This will enable you to use the rear-view mirror control switch. If you hear the motors running, then your mirror's circuit is fine, but its drive mechanism is faulty. There's no solution for that except the replacement of the entire assembly.
Troubleshooting the rear-view mirror's circuit
If you don't hear the motors running, you'll need to check the electric mirror circuit fuse inside the fuse box. If the fuse is no longer intact, replace it with a new one. However, if the fuse is in good condition and your electric rear-view mirror still doesn't work, you'll need to test the control switch by dismounting it from the panel without disconnecting anything. Then, turn on your ignition and check the control switch's voltage with a test light. If it doesn't light up, replace the switch. If the switch is fine, then you'll need to check the wires connected to it for any shortages. If those wires are fine, then the damage can be with the wires connected to the mirror assembly. If the mirror assembly wires can power up the test light, then the actual assembly needs replacing.