The Electronic Ignition Switch also called the EIS or EZS in a Mercedes vehicle is a critical component that controls various systems in the vehicle, including the immobilizer. If the EIS fails, the car will not start, and you could be faced with an expensive replacement bill from the Mercedes main dealership. However, there is another option for many EIS units. We are able to transfer the data from your old (existing) unit to a replacement (donor) unit assuming the part numbers are compatible. For a guaranteed fuss-free service we would always suggest that you match part numbers 100%.
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