When your Mercedes E320 won’t crank, the first thing that you can think about is that it is going to cost you a lot of money to get the problem fixed. It is a common problem that many Mercedes E320 models have.
The problem is usually the fact that they E320 neutral safety switch is no longer working. That means you will not be able to crank up the car even if you have enough gas or battery power. One way that you can quickly tell that it is the E320 neutral safety switch is by turning on the headlights before you try to crank up the car. If the lights stay on when you crank the car then it is mostly like the Mercedes neutral safety switch.
So how do you go about fixing this problem? The safest way to fix this problem is to have a mechanic replace the Mercedes neutral safety switch which is located right under the gear stick if you have an automatic transmission.
This will restore normal circuitry to your cars neutral and park sensors which will allow your car to crank up. If you look on E-Bay you can find the E320 neutral safety switch for about $60. You will most likely spend over $100 if you go to a Mercedes shop.
However, if you don’t want to spend any money at all then there is another solution to use if your Mercedes E320 won’t crank. There are 4 wires that come from the neutral safety switch in the Mercedes Benz E320. Those wires also run under the steering wheel. They protrude out of the right wall near the feet of the driver seat.
It is a 4 pin plug, so you will see 4 wires. In a 1995 E320, you will want to connect the purple wires together to complete the neutral lock out circuit. These wires may be different colors in newer models. These two wires will be a little thicker than the other two wires that are on the same harness.
You don’t have to cut the wires. You can simply scrap off the plastic to expose the metal wire on both the purple/white and purple negative. You can clamp them together with anything that can secure itself such as electrical tape or plastic locking string. This won’t crank your car.
This will allow you to use the key to crank the car no matter what gear it’s in, so be careful not to be in anything other than Park or Neutral.