Smart Key does not deactivate central locking - Page 2 - Mercedes-Benz Forum

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post #11 of 12 (permalink) Old 06-16-2010, 08:10 AM Thread Starter
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Checked all fuses, relays and battery. All seems to be fine. Any ideas?
Seems like I will have to call in the pros to sort this out.
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post #12 of 12 (permalink) Old 06-16-2010, 12:26 PM
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Originally Posted by dkc180 View Post
Checked all fuses, relays and battery. All seems to be fine. Any ideas?
Seems like I will have to call in the pros to sort this out.
Considering the facts that your battery seems to have enough power and you have two keys that have been working previously (very good from you, usually owners at this stage only have one key which makes it difficult to eliminate likely faults), it does look like the AGW or the EIS issue in which case you would have to have the car diagnosed properly (with a Star diagnosis tool, also some independent shops may have one, why not some individual MB enthusiasts if you can find one closer to you).

I'm not sure about the CGW but the EIS issue usually is a bit intermittent before it fails completely and often occurs first when the unit is very cold (car parked outside in the winter) but diagnosis would tell if it was one or the other, or something else.
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