Name: Mercedes-Benz EIS Testing Key

Description:

EIS(Electronic Ignition Switch) computer of Mercedes-Benz is one which of computers easiest to get damaged because of following reasons:

1.  If you insert key to EIS but do not start the car for a long time and keep the door open and light on, the battery is easy to get low voltage. The battery voltage below 8 volts is the most likely reason for data loss.

2. When Car does not have enough power, or while plus power for charging the battery, please do not start the car. If battery clamp in bad contact, starting car may lead to data loss easily.

3. CPU Motorola chips of EIS computer instability or aging, likely to cause the EIS on and off problem or completely not start car.

How to identify Mercedes-Benz EIS is damaged or loss of key data?

There are many senior electrician of the electrical repair shop can not repair it when they face  this problem, now you can find the exact problem by using this simple EIS Testing Key.

1. Insert the Mercedes-Benz EIS Test Key into the ignition switch, if indicator light flash (about 3-6 seconds), means that the EIS ignition switch computer working properly, then open door with the original car keys, if it can not start the car, then proved that the key lost data. With the addition of a spare key maybe start the car.

2. Insert the Mercedes-Benz EIS Testing Key into the ignition switch, if the indicator light does not light on, means EIS ignition switch computer is damaged.  EIS ignition switch computers can be repaired, the cause of damaged generally is Motorola CPU computer chip of EIS ignition instability or aging. Replace the CPU or modify part of the data then the problem will be solved.