Troubleshooting Tips for The Mercedes Benz S500 Neutral Safety Switch
The neutral safety switch of your Mercedes Benz S500 is an important tool in your vehicle's starting procedure. It keeps the car from suddenly flying off the pavement whenever you don't notice that you are starting it in gear. However, prolonged usage and harsh elements wear the part down. If you want to make certain of your neutral safe switch's functionality, then here is a list of common problems and how to troubleshoot them:
Vehicle not starting
If you could not start your vehicle and there are no problems with either the ignition coil or the starter, then you need to check the positioning of the neutral safety switch. See if the part is still aligned properly. It sometimes shifts out of alignment, preventing ignition since it would think that it is not safe to start the car. A way to test this is getting a voltmeter and connecting it to the switch. Then, set your car in reverse, but do not start the engine in any way. Instead, look at your voltmeter to determine whether there is any power registered. If not, then the neutral safety switch really is misaligned or even faulty. Another way to test this is through the shifter. Put it into neutral position first, and then try starting the vehicle. As you turn the ignition key, shake the shifter around a bit. This allows power transfer past the switch and to the starter. If your vehicle starts then, it means it is time to either repair or replace your neutral safety switch.
Starting in gear
The other common car problem related to the neutral safety switch is when you start your vehicle, and it suddenly moves because it is in gear already. When this happens to you, inspect the contacts around the neutral safety switch. Due to external factors such as physical damage, metal shavings, and moisture, they may cross over and short the terminal. This leads to the neutral safety switch not being able to stop the car when you start it in gear. Fixing the contacts as well as tinkering with the wiring should help you solve this.