Wonít unlock. - Mercedes-Benz Forum
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post #1 of 33 (permalink) Old 07-10-2019, 06:17 AM Thread Starter
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Wonít unlock.

This morning I tried unlocking my clk350 07 and the car was not unlocking. I changed the batteries, still nothing strangely the panic button did work.
To make matters worse I couldnít unlock the door with the key either. The key turned but car wouldnít unlock. (Key is a little bent)
I had to leave for work Iíll try again later when I get back home.


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post #2 of 33 (permalink) Old 07-10-2019, 07:48 AM
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IF you have it, have you tried the second fob. It may be a dead car battery - not so much so that the panic alarm would not work, but not enough power to activate the door locks. Panic alarm takes very little power. Key being bent may have caused it to not activated tumblers properly. Also normally if the car has been locked with the fob and the emergency key is used to unlock it the alarm will go off.
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post #3 of 33 (permalink) Old 07-10-2019, 06:42 PM Thread Starter
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Ahhh still no luck. Came home and tried to get in the car but no luck. Tried using the key, but the key wonít turn all the way goes about 3 quarters of the way feels very stiff. And the trunk I can barely turn the key at all.

Any ideas on what I can do to get in? I want to make sure I try everything before having to call a tow truck.


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post #4 of 33 (permalink) Old 07-11-2019, 04:17 AM
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You might try some lock lubricant sprayed into the key hole. The mechanical lock assembly has not been used in almost 20 years! Normally, there is some slight resistance when turning the key, but not much. If that does not work, then maybe calling a locksmith would be in order. If that is your only key, you do not want to break it off in the key hole. Do not know if your model has this feature, but have you tried holding down the unlock button to raise the top and lower windows? Of course, if your car battery is dead that would not work.
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post #5 of 33 (permalink) Old 07-11-2019, 04:31 AM Thread Starter
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This morning I went to the hardware store and bough lock easy. With a little force the key turned all the way but the door still hasnít opened. I tried using the remote to open the top/windows but itís not responding. The trunk lock wonít budge at all.


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post #6 of 33 (permalink) Old 07-11-2019, 04:42 AM
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Since it is a convertible, you should be able to run a coat hanger over the window to the door handle and pull on it to open the door. Put a loop in the hanger large enough to go around the door handle.
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post #7 of 33 (permalink) Old 07-11-2019, 05:03 AM Thread Starter
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You can get in through the top cause the window sits tight in between the seal.
I should be able to get in between the two windows though by the seal. But Iíll need find a long enough coat hanger.
Or Iíll see if I can find a thing long metal rod to squeeze between the 2 windows and press the unlock button in the middle counsel.


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post #8 of 33 (permalink) Old 07-11-2019, 06:27 AM
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If it is an electrical issue, those buttons will not work either. If you could get a long stiff flat rod with a loop on the end maybe you could reach the door handle on the opposite side. Or you could call a locksmith who could use a slim Jim to open the door. Good luck.
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post #9 of 33 (permalink) Old 07-11-2019, 11:27 AM
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I han't realized that the cabrio was such a problem to enter if the central locking system had a problem. With a coupe you can always go in via the trunk.

Here is a schematic of the overall CL system. Did you try using the IR receiver on the driver's door? Does the red LED show on the key when pressed? Did you insert the new batteries the right way?

A spare key fob is essential for secure ownership imo...
Attached Files
File Type: pdf W209 CL.pdf (583.6 KB, 19 views)
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post #10 of 33 (permalink) Old 07-11-2019, 03:31 PM
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Originally Posted by keyhole View Post
I han't realized that the cabrio was such a problem to enter if the central locking system had a problem. With a coupe you can always go in via the trunk.

Here is a schematic of the overall CL system. Did you try using the IR receiver on the driver's door? Does the red LED show on the key when pressed? Did you insert the new batteries the right way?

A spare key fob is essential for secure ownership imo...
Can not go through trunk if you can not open trunk!! And yes a spare fob is essential.
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