Merecedes e270 trunk electrics fault

Fuse box in passenger compartment Alfa Romeo 156.
fuse box location.
The fuses for the main devices are housed in a control unit under the dashboard, to the left of the steering column. To gain access to them, remove the panel (A) releasing the tabs (B) in the direction of the arrow below and remove the screw (C).

fuse box layout.

1 Ignition auxiliary circuits relay 1 2 Heated rear window relay 3 Horn relay F1 (10A) RH headlamp- high beam F2 (10A) Headlamp high beam warning lamp, LH headlamp-high beam F3 (20A) Boot lid/tailgate lamp, central locking F4 (10A) Headlamp adjustment, RH headlamp-low beam F5 (30A) Electric windows(front) F6 (10A) LH stop lamp, LH tail lamp, RH licence plate lamp, RH rear fog lamp, RH side lamp F7 (10A) LH licence plate lamp, LH rear fog lamp, LH side lamp, RH stop lamp, RH tail lamp F8 (10A) LH head lamp-low beam F9 (15A) Cigarette lighter, heater/air conditioning (AC) F10 (20A) Wind screen wash/wipe system F11 (20A) Horn F12 (10A) Alarm system, anti-lock brake system (ABS)(with ESP), audio system, instrument panel, interior lamps F13 (10A) Anti-lock brake system (ABS), central locking, electric door mirrors, electric windows, glove box lamp, reversing lamps, stop lamp (high level) F14 (10A) Hazard warning lamps F15 (30A) Door mirror heater, heated rear window

This will be a dealership repair.

Check trunk release solenoid for power and ground when applied from switch. If power and ground ok, then release solenoid is the problem in the trunk lock mechanism. If misssing power or ground, then electrical diagnostics will be required

I would get the remote checked at a parts store like Autozone. Could be trunk release button is stuck. Also try disconnecting the battery(neg terminal) and then see if trunk locks. The locks are made to work mechanically without electric. This way you would know if it is an electric problem or broken lock.

i found the solution to same problem here.
http://mbworld.org/forums/e-class-w211/314638-no-power-trunk-3rd-brake-light-license-plate-lamps-2.html
it was a easy fix, broken wires in the boot a common fault with mercedes.

thats easy,locate the fuse for the electric trunk lock,take the fuse out,hook a piece of wire to one of the contacts where the fuse goes into and hook it to the battery or an acc line in the fuse box then hit your electric trunk switch and it should open,if it doesnt work try the other side where the fuse hooks into

Does pushing the trunk release button make the back up lights illuminate? Has the car been serviced or wrecked before this problem? Have you been golfing and put clubs in the huge trunk. Either the ground wire for the trunk lid devices is bad or the trunk release wire (purple/orange) and the reverse lamps wire (purple/white) have been reversed.

It is your wiring coming out of the trunk on the left side. One of the wire are cut because in cold weather when you open the trunk, wire can't move easily in the plastic tube. Sorry for my english.

Hi

I had a similar problem on my e270 cdi and fixed this by earthing the 3rd brake light . This has solved the problem . No more errors like : 3dr brake light and numbret plate light malfunction ...

Aubrey
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Your trunk master switch is probably off. Open the glove box, and, on the driver side of the glove box, the trunk master switch is located there. If this is activated, the remote and the dash switch are deactivated. Please repost if this does not solve your problem.