So, im upset with myself, 2006 e320 cdi, sat for 2 years, cant open trunk.
Now trunk wont open, battery is dead, metal key turns left, handle acts like its not connected to the latch. Ironically my parts car trunk works perfectly. All my research says no jump point under hood. Thanks mercedes.
Im ok with destrying this trunk lid, ive come to terms with it, ill just mount the parts car trunk. I would like to exhaust all possibilities before that.
Can i access the battery cable on the starter if i jack it up?
Thanks all.

The 06 e320 has no dedicated underhood jump points.
Yes the car was open. I popped the hood.
Heres the answer. The fuse box on the left side (lhd) has a hidden lug in the back.
THIS IS NOT A JUMP POINT. This is purely to wake up the network. It was very difficult to clip a jump box clamp on it. I cut a smaller clamp of a set of jumper cables, stripped the wire back and connected my positive to there. The negative jump cable went to a lug on the suspension tower. I turned on the jump box, opened the drivers door and pulled the trunk switch, it worked.




Sold W211 few years ago, but I still remember the big fuse box under the hood.
I would use it to hook up the charger. Jumping it for engine cranking might not be recommended.
Than if I remember it right, W211 has main power cables going under passenger foot carpet?
Once you open the trunk, check mechanical lock rods for disconnection.

EDIT: Looked up the 211 style and what a odd design. Assume for battery life may be better but much more larger gage wire to go to the trunk and not having easy way to open trunk if dead battery seems like a poor engineering design. Ahh well hope ya got it figured out.
Last edited by Quint22; Oct 2, 2023 at 10:07 PM.

The 06 e320 has no dedicated underhood jump points.
Yes the car was open. I popped the hood.
Heres the answer. The fuse box on the left side (lhd) has a hidden lug in the back.
THIS IS NOT A JUMP POINT. This is purely to wake up the network. It was very difficult to clip a jump box clamp on it. I cut a smaller clamp of a set of jumper cables, stripped the wire back and connected my positive to there. The negative jump cable went to a lug on the suspension tower. I turned on the jump box, opened the drivers door and pulled the trunk switch, it worked.




Aux battery in MB have different functions thru the years, but they usually are emergency battery, who is disconnected from main system in normal operation.


