Description
Please note: Prices begin from £180 depending on the exact fault we find, price may be more. (You will be informed beforehand if you wish to proceed.)
Mercedes EIS / EZS Immobiliser Key Module Problems and Repairs
Symptoms we can diagnose and repair are:
– Unable To Turn The Key
– Unable To Start The Car
– Turn The Key – But Car Won’t Start
– Intermittent Ignition Key Faults
– Vehicle not responding to remote
If the EIS unit becomes faulty, the key will not turn & start the engine, this function will be de-activated and the module will be locked for security purposes. This will stop the engine from starting. It is a common problem caused by factors such as:
– Jump Starting Whilst Key Is Inserted
– Power Surge
– Low Battery Voltage
– Damage to key
– Damage to EIS
These issues often cause memory loss or corruption of the EIS module, which cannot be repaired using normal Mercedes diagnostic systems. While replacement units are expensive and require programming, we offer a full repair and reconditioning service. If your original EIS is beyond repair, we can supply a reconditioned unit fully programmed to your car and ready to install.
