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Trunk lid stuck on 2006 S500, metal key does not open

Customer Question
Trunk lid stuck on...

Trunk lid stuck on 2006 S500

Mechanic's Assistant: Thanks. Can you give me any more details about your issue?

Metal key does not open appears fuse blow no power to door button key fob not activating opener either

Submitted: 2 years ago.Category: Mercedes
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Answered in 16 minutes by:
2/11/2016
Mercedes Mechanic: Lou P. master tech, Mercedes Technician replied 2 years ago
Lou P. master tech
Lou P. master tech, Mercedes Technician
Category: Mercedes
Satisfied Customers: 5,864
Experience: 20 years Master Certified excellent fix rate and have access to factory wiring, and instructions.
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hello, so are all the doors locked at this point?

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Customer reply replied 2 years ago
no all other doors work fine including soft close
Mercedes Mechanic: Lou P. master tech, Mercedes Technician replied 2 years ago

ok, so far so good. that means that the trunk lid element is leaking so the pse pump will not send pressure to the lid to pop it. do you have the metal key? also do you know where the fuse block is under the back passenger seat?

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Customer reply replied 2 years ago
i have the metal key i turned it counter clock wise to no avail i do not believe it ever worked
i have the bottom of the back seat out not sure where the fuse box is?
Customer reply replied 2 years ago
trunk key history; when battery died a few 7 years ago MB roadside guy could not get key to work trunk so we powered though front fuse box and use button in car
Mercedes Mechanic: Lou P. master tech, Mercedes Technician replied 2 years ago

ok, so

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Mercedes Mechanic: Lou P. master tech, Mercedes Technician replied 2 years ago

you insert the key, turn it counter clockwise to 11 oclock, then while its turned pop the trunk with the handle or by pushing in the key hole, there were 2 designs. did you try that?

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Mercedes Mechanic: Lou P. master tech, Mercedes Technician replied 2 years ago
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Mercedes Mechanic: Lou P. master tech, Mercedes Technician replied 2 years ago

Fuse 62 is what you need to remove and see if it is blown. If it's now blown reinsert it and the trunk should now work

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Customer reply replied 2 years ago
k going to try
Mercedes Mechanic: Lou P. master tech, Mercedes Technician replied 2 years ago

ok im here.

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Customer reply replied 2 years ago
ok it activated the pump- the right/passenger hinge pushed up- i could here the hydraulics activate but the latch did not release try key at same time did not open
Mercedes Mechanic: Lou P. master tech, Mercedes Technician replied 2 years ago

ok put your ear to the trunk see if you can hear hissing

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Customer reply replied 2 years ago
i could not hear air just the hydraulic lift
Mercedes Mechanic: Lou P. master tech, Mercedes Technician replied 2 years ago

Ok try to pull the fuse once again. Then listen before you press the unlock button. Also make sure the keyhole is straight up and down. If the keyhole is turned left and right it will lock out the opening function

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Customer reply replied 2 years ago
ok
Customer reply replied 2 years ago
car running? or off?
Mercedes Mechanic: Lou P. master tech, Mercedes Technician replied 2 years ago

Off

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Customer reply replied 2 years ago
k
Customer reply replied 2 years ago
no luck opening or air sounds i had to start battery getting low tried both ways on and off no air sound
Customer reply replied 2 years ago
latch is holding tight tried "bouncing" trunk lid as it was actuating - no movement
Mercedes Mechanic: Lou P. master tech, Mercedes Technician replied 2 years ago

Ok. Is there anything in the trunk ? Like did you just go shopping ? Something maybe wedged in latch ?

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Customer reply replied 2 years ago
i was thinking the net that is all thats in there
Mercedes Mechanic: Lou P. master tech, Mercedes Technician replied 2 years ago

Ok so let's revisit the mechanical key.

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Mercedes Mechanic: Lou P. master tech, Mercedes Technician replied 2 years ago

Does the key in fact turn left to 11 o clock ? When it does you may feel slight tension as it turns if you do that's a good sign that it's moving the linkage inside

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Customer reply replied 2 years ago
turns both ways
slight click at 11 - no release
is it supposed to push upward- cause it doesn't
Mercedes Mechanic: Lou P. master tech, Mercedes Technician replied 2 years ago

Ok so do you have a handle in the middle of the trunk ? Or does your lock area press in ?

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Customer reply replied 2 years ago
two buttons
trunk open and car lock
key to left of buttons
the lock turns no button effect
Mercedes Mechanic: Lou P. master tech, Mercedes Technician replied 2 years ago

Turn the key to 11 and while HOLDING it there press it in upwards

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Mercedes Mechanic: Lou P. master tech, Mercedes Technician replied 2 years ago

Don't be afraid to press in a little hard. It has not been pressed probably in 10 years

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Customer reply replied 2 years ago
ok tuned it from 6 to 12 counter clockwise it stops short of 11 might be a 1/8 inch movement but no opening
even put slight pressure with a needlenose
rocked it up and down while trying
Customer reply replied 2 years ago
pressed hard enough to raise car up on suspension
Mercedes Mechanic: Lou P. master tech, Mercedes Technician replied 2 years ago

Oh good lord.

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Mercedes Mechanic: Lou P. master tech, Mercedes Technician replied 2 years ago

Well the only way to get in the trunk is to manually pop it. Or keep resetting the pump by removing the fuse so it may pop the trunk. That is it. Again make sure the keyhole slot is vertical cause if it's horizontal the trunk lock will not activate as a theft deterrent.

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Mercedes Mechanic: Lou P. master tech, Mercedes Technician replied 2 years ago

Are you trying to get into trunk for a specific reason ? The car runs and drives right ?

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Customer reply replied 2 years ago
cANT TRAVEL WITH KIDS DOGS
Customer reply replied 2 years ago
can i access latch by drilling?
Customer reply replied 2 years ago
behind license plate?
Customer reply replied 2 years ago
just drove 1000 miles over last 4 days with language on back seat LOL
Mercedes Mechanic: Lou P. master tech, Mercedes Technician replied 2 years ago

It's behind license plate yes. But let's try working the lock. Can you send me A few pictures of the lock area ?

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Customer reply replied 2 years ago
how do we pop it?
Customer reply replied 2 years ago
in the morning
Mercedes Mechanic: Lou P. master tech, Mercedes Technician replied 2 years ago

Ok. Send me some pictures. I'm thinking maybe we can tap the lock (keyhole area) with a hammer to try and free up the mechanism. But I'd like to get a visual. Have a good night. Lou

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