Where is the ignition switch on a Mercedes Benz?
Here are several Group 94 batteries on Amazon that are exact fit for most Mercedes-Benz cost and cost a lot less than the battery that you buy at the dealer The ignition switch needs to be in position I, II or engine running. Once you turn the key to any of these positions the shifter is unlocked from park, via a cable or electronic switch.
What do you need to know about ignition switches?
The ignition switch needs to be in position I, II or engine running. Once you turn the key to any of these positions the shifter is unlocked from park, via a cable or electronic switch. If the cable or the ignition switch itself fails the shifter may get stuck in park. Do not force the shifter into gear.
How does a smart key work on an ignition switch?
As you insert the Smart Key remote into the Electronic Ignition Switch (EIS) control module (N73), power is supplied to the key by the induction coil ring located in the EIS. Data is then exchanged with the infrared transmitter to validate the Drive Authorization.
Why is my ignition not working on my Mercedes Benz?
It is possible that the battery in the car is defective, as it does not provide the necessary voltage for the ECU and the N73 Electronic Ignition/Starter Switch (EIS) to function properly. If the battery is dead or has low voltage / under voltage, the CAN communication between EIS and N72 may not function properly.
What to do if your Mercedes ignition switch is not working?
If you have a spare key try to see if you are experiencing the same symptoms with the other key. If the other key works, keep using it for a couple of weeks to verify that the issue is really the key and not the EIS. Try scanning your Mercedes-Benz for fault codes. Ideally using a Start Diagnostic Scanner.
As you insert the Smart Key remote into the Electronic Ignition Switch (EIS) control module (N73), power is supplied to the key by the induction coil ring located in the EIS. Data is then exchanged with the infrared transmitter to validate the Drive Authorization.
What to do if you have an ignition switch problem?
If they come to the conclusion that the Ignition Switch (EIS-EZS) is the culprit you will be told that the switch will need to be replaced. This is an expensive repair that can cost several hundred dollars. You have a few options here. Have the dealer install a new ignition switch, and they will program it to match the VIN of your Mercedes-Benz.
Where can I get a Mercedes EZs EIS ignition switch?
Check out these companies that provide Mercedes EZS EIS Ignition Module online. W202 W203 W208 W209 W210 W211 W220 W215 W219 W230 W463 W639 W906