SL-Class (R230) 2003 -- 2012: Discussion on the SL500, SL550, SL600

SL/R230: Trunk/boot stuck closed

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Old Jul 15, 2025 | 05:37 AM
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yelnats69's Avatar
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SL 350 2012
Trunk/boot stuck closed

2009 SL350 Face Lift model Boot is stuck closed. Battery removed and boot closed by mistake. Tried the emergency key.
I saw utube showing access by removing 3rd Brake light, has anyone tried this? Any suggestions, brake light cost £15 so would be cheap solution. Thing is utube looks authentic just looking for practical advice before trying
Rgds
Stan ( yelnats69)
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Old Jul 15, 2025 | 07:09 PM
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Have you used emergency key previously?

If not it is not intuitive how it works.

Turn key 90 degrees then pull the release handle while lightly lifting.

The key does not open the trunk, just unlocks it.

If the key does not turn, try some penetrating oil in the lock, and GENTLE persuasion by twisting key.
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Old Jul 16, 2025 | 07:07 AM
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350 SL
Thanks for the reply, tried all aspects with the emergency key and so far no good.
Is the key purely mechanical or does it need 12v from. battery.
I assumed the battery for the top is the one located in the boot
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Old Jul 16, 2025 | 07:44 AM
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Originally Posted by Stan1*
Thanks for the reply, tried all aspects with the emergency key and so far no good.
Is the key purely mechanical or does it need 12v from. battery.
I assumed the battery for the top is the one located in the boot
The key is purely mechanical, and when operated allows the latch to operate, enabling the boot/trunk to open
Does the key turn a FULL 90 degrees?
Does the handle feel like it is acting on something when you pull on it

Another possible option if you can get to the engine compartment is to hook 12v to the front pre-fuse box, but you should seek more advise before doing this as I do not have it's electrical drawing with me to give good advice.
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Old Jul 16, 2025 | 08:46 AM
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If you insert the key, does the dash light up? If so, the trunk release button on the door should work.
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Old Sep 27, 2025 | 08:20 AM
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SL 350 2012
Originally Posted by g0rsq
Have you used emergency key previously?

If not it is not intuitive how it works.

Turn key 90 degrees then pull the release handle while lightly lifting.

The key does not open the trunk, just unlocks it.

If the key does not turn, try some penetrating oil in the lock, and GENTLE persuasion by twisting key.
Thanks for the reply, the key turns in both directions, I think that their are no hydraulics involved and I get no feeling from the handle
Rgds
Stan
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Old Nov 2, 2025 | 08:57 PM
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When you turn the key it won't open the trunk but it will allow you to use the handle above the license plate to open the trunk. The key is strictly mechanical. Even if you don't have a battery, it will still allow you to open it.
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Old Nov 2, 2025 | 11:24 PM
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Try the key, keep in 11 O'clock position and pull handle, you may have to pull a bit harder but don't break the mechanism... probably hasn't been used for a long time...

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Old Nov 14, 2025 | 02:48 PM
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SL 350 2012
Boot/trunk still stuck

Originally Posted by tallguy2020
Try the key, keep in 11 O'clock position and pull handle, you may have to pull a bit harder but don't break the mechanism... probably hasn't been used for a long time...
​​​​​​.
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