I have an 06 CLK 500 Cabriolet. The doors will lock and unlock normally except when the outside door handle is used. This problem has gotten progressively worse over the last year. What I mean is before it would perform normally with one smart key but with the other it would not unlock but would lock. Later both smart keys would fail to unlock on the first attempt but would work on the second. Later neither would unlock but both would lock. Now neither will lock or unlock the doors. Remote lock and unlock works fine and so does locking and unlocking on the dash. As well, unlocking and opening from the inside handle works. All other functions of the smart key work fine, (trunk, keyless go, fuel door, soft top), and all batteries have been recently replaced. I am perplexed. Is this a programing issue?

 

no. the issue is probably the contacts at the battery in the remote. you need to bend them for better contact with the batteries. theres also a small contact on the otherside that makes contact with the inside of the remote case and bending that upward more should help you..unless youve got water in there at some point.

 

Thnx will try that

 

OK, I thought I had everything accounted for but it looks like both remotes work at the passenger door, trunk and fuel door. Looks like the sensor in the drivers side door may be faulty because the top won't work with the remote either.

 

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