My trunk wont open on my e350

Remove the wheels if possible.
Remove the two clips from each side (by pulling up the center).
Move the fender liner away to access and remove the 7 mm bolt that is near the corner.
Unscrew the four cargo anchors from the floor of the trunk.
Move the trim panel and remove the 4 10mm bolts.

To get to the license plate lights assembly, you can follow these steps:

Open the rear compartment lid and locate the license plate light assembly inside the trunk lid.
Above the license plate, locate four Philips head screws holding the license plate light assembly inside the trunk lid.
Remove the screws (caution: in winter, plastic is extremely fragile and can break easily).
Once the screws are off, your license light assembly is loose inside the trunk lid.

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boot wont unlock pergut 307

Check fuss first under carpet in trunk there is module

your going to remove the entire trunk lid assembly from the vehicle. If you open the trunk and look from the inside you should either see black plastic wing nuts or 10mm nuts holding the assembly to the trunk. There will be approximately 10 of them that will need to be removed. Once they are removed the lens assembly will pop away from the trunk lid. The license bulbs can then be replaced. I usually replace all six taillight/license bulbs whenever I have one of these apart. Its the same bulb for all six lights.

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you need to check the brown wire at the rear of the truck on the drivers side.this wire is the taillight wire that also powers the license light.check with a test light for the area of lose of power and repair the wiring.there is a splice that feeds to the taillights and license light.it could be a corroded wire or broken wire.

CLS550 2010. Same complaint trunk won't open, third brake light and license plate lights not working. Two ground wires (Brown) were broken inside the bundle of wires right were the zip tie holds them to the trunk lid arm. When I first looked I missed them. Remove all the corrugated wire protection and look the wires over very closely. One of them was broken inside but the wire just looked kinked on the outside. The other was broken in too. 7/9/17

YOU HAVE TO OPEN THE TRUNK LID REMOVE THE BLACK PLASTIC COVER FOR THE TRUNK LID LATCH.REMOVE THE LICENSE PLATE LIGHT HOUSING FROM THE TRUNK LID.REMOVE THE BULB SOCKET FROM THE LICENSE PLATE LIGHT HOUSING.TO REMOVE BULB FROM THE SOCKET SIMPLY PULL IT STRAIGHT OUT OF THE SOCKET.

check your ground side of the light circuit

there is a short somewhere.put a test light in place of the fuse.
the light will glow bright.when the short is removed,the light will go dim

yes,thats the only way sorry to say.