Dead trunk battery
Thread Starter
Newbie
Joined: May 2025
Posts: 9
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2006 e55 amg
Dead trunk battery
as you can see by the title most of you may now know that im locked out of the trunk of my 06 e55😐. the battery went dead on me and ive been trying to get into it for about a week now trying to find a solution anywhere you can think of. ive tried, the mechanical key in the lock cylinder, trying to get voltage to the trunk battery through different ground points throughout the car. the mechanical key works for the doors but the trunk just doesnt want to open whats so ever. im trying to refrain from taking it to the dealer or calling roadside assistance. any mb vet got any info?🤷♂️
Last edited by jacksonamg; Nov 17, 2025 at 06:07 PM.
Thread Starter
Newbie
Joined: May 2025
Posts: 9
Likes: 0
2006 e55 amg
well im pretty sure it does but the owners manual doesnt call for jumping the car on any other battery other than the one in the trunk. regardless ive tried the ground points by all the fuses in the engine compartment and the spare battery up front. ive even tried the ground points under the carpet on the passenger side.
MBWorld Fanatic!
Joined: Jan 2014
Posts: 3,978
Likes: 1,323
From: Republic of Texas
'99 and '05 E55 AMG
Try a search upper right. The below was posted just yesterday.
https://mbworld.org/forums/w211-amg/...on-t-open.html
https://mbworld.org/forums/w211-amg/...on-t-open.html
MBWorld Fanatic!
Joined: Jul 2005
Posts: 3,176
Likes: 19
From: London, UK
No longer stock '06 E55, A3 3.2 Quattro, GLE 400d, R107 280SL, Golf Polo
Boot manual key - WD40 + Persistence + some mild heat around the latch handle - hairdryer should suffice - if handle is stuck open . Don't be scared to soak it in WD40 though.
Add some silicone grease to the key before inserting into boot lock as well and repeat above.
Also just to be sure... you insert key rotate it (think its clockwise) and then pull on the handle to open. Turning left will lock it. (or vice versa but try both)
Open bonnet and charge up the AUX battery upfront. This should give enough power to release the latches electronically. (if that still works). Any fuses blown?
You could try removing the number plate lights to mbe get some WD40 routed closer to the interior lock mechanism?
[Edit - didn't realize you could get into car]
Add some silicone grease to the key before inserting into boot lock as well and repeat above.
Also just to be sure... you insert key rotate it (think its clockwise) and then pull on the handle to open. Turning left will lock it. (or vice versa but try both)
Open bonnet and charge up the AUX battery upfront. This should give enough power to release the latches electronically. (if that still works). Any fuses blown?
You could try removing the number plate lights to mbe get some WD40 routed closer to the interior lock mechanism?
[Edit - didn't realize you could get into car]
Last edited by stevebez; Nov 19, 2025 at 11:40 AM.
