Rear trunk lid wont close

Do you know anything about automotive electronic's ? The trunk release is controlled by electronic control modules . Having the vehicle check for DTC'S - diagnostic trouble code's should be the first step in the diagnostic procedure . Then reading how it work's !
Factory service repair info.
Rear Compartment Lid Release System Components
• Body control module (BCM)
• Remote control door lock receiver
• Interior rear compartment lid release switch
• Exterior rear compartment lid release switch
• Rear compartment lid release actuator
• Trunk release relay

Rear Compartment Lid Release Operation
The interior rear compartment lid release switch receives a signal from the driver door switch assembly (DDSA). When the interior rear compartment lid release switch is activated, the signal circuit is pulled to ground. The DDSA interprets this and sends a GMLAN serial data message to the body control module (BCM) requesting the rear compartment lid be released. The BCM responds by applying battery voltage to the trunk release relay control circuit which energizes the TRUNK RELES relay. The trunk release relay is supplied with battery voltage at all times. With the relay coil energized, the relay switch contacts close allowing battery voltage to flow to the rear compartment lid release actuator causing the rear compartment lid to release. The rear compartment lid release actuator is permanently grounded at G402.

The trunk release relay is located in the rear fuse box located under the back seat.

The rear compartment lid release system consists of the following components:
• Body control module (BCM)
• Folding top cover actuator
• GMLAN serial data link
• Keyless entry transmitter
• Rear compartment lid ajar switch
• Rear compartment lid release actuator
• Rear compartment lid release switch
• Remote control door lock receiver (RCDLR)
• Trunk fuses
• Trunk release relay

Rear Compartment Lid Release System Operation
The rear compartment lid can be released by operating the rear compartment lid release switch or pressing the rear compartment lid release button on the keyless entry transmitter. When the rear compartment lid release switch is operated, the rear compartment lid release switch signal circuit to the body control module (BCM) is switched to ground. The BCM receives the rear compartment lid release switch input and applies ground to the trunk release relay control circuit. This energizes the trunk release relay coil, closing the switch side contacts, allowing battery voltage to be applied to the rear compartment lid release actuator and folding top cover actuator, releasing the buttresses and opening the rear compartment lid. Ground for the rear compartment lid release switch is provided at G300. The rear compartment lid ajar switch, rear compartment lid release actuator, and folding top cover actuator are provided ground at G301. The rear compartment lid will not release until the vehicle speed is zero and in park.

Do you know what DTC'S - diagnostic trouble codes are ?
DTC B3265 01 : Trunk Relay Output Short to Battery
DTC B3265 06 : Trunk Relay Output Short to Ground or Open

Do you know what a relay is an how it works ? TRUNK release relay located in the underhood fuse / relay box.
VEHICLE RELAYS Operation Diagnosis

Hi Jeff,
I was going to say, check fuse/ jump the load side of relay Good post.

Pressing the rear compartment lid release switch provides an input signal to the instrument cluster. The instrument cluster sends a Class 2 serial data message to the body control module (PZM). The PZM grounds connector C6 of the rear compartment lid release solenoid through CKT 1344 (LT BLU) if the following conditions are present:
?€¢
The transaxle is in the PARK position.

?€¢
The valet lockout switch is closed.

Power is supplied through the following components to the now-grounded CKT 1344 (LT BLU):
?€¢
The RADIO/PHONE fuse

?€¢
CKT 40 (ORN)

?€¢
The coil of the rear compartment lid release relay
The relay coil energizes and closes the relay contacts.
Power is supplied from the CONVENIENCE fuse through the following components:
?€¢
CKT 2040 (ORN)

?€¢
The now-closed relay contacts

?€¢
CKT 56 (BLK/WHT)

?€¢
The rear compartment lid release solenoid
The solenoid energizes and the rear compartment lid latch assembly releases the rear compartment lid.

1

Did you perform the rear compartment lid release system check?
--
--
Go to Rear Compartment Lid Release System Check

2

1. Place the transaxle in the PARK position.
2. Turn the valet switch OFF.
3. Connect the scan tool to the data link connector (DLC).
4. Turn the valet lockout OFF.
5. Press the rear compartment release switch.

Does the body control module (PZM) command the rear compartment lid release ON?
--
Go to Step 3
Go to Step 7

3

1. Disconnect the rear compartment lid release relay.
2. Connect a test lamp between terminal D4 and ground, and terminal D6 to ground.

Does the test lamp light at both terminals?
--
Go to Step 4
Go to Step 14

1. Connect the test lamp between terminal D4 and terminal C6.
2. Press the rear compartment lid release switch.

Does the test lamp light?
--
Go to Step 5
Go to Step 15

5

Connect a fused jumper between terminal D6 and terminal C4.
Does the rear compartment lid open?
--
Go to Step 6
Go to Step 16

6

Replace the rear compartment lid release relay.
Does the rear compartment lid release operate properly?
--
Go to Rear Compartment Lid Release System Check
Go to Step 7
If you don't know what your dealing with there is no way you can fix it . I suggest you take it to a qualified ASE certified repair shop or the dealer !

is this recent or a long time condition? there is no track to speak of just hinged arms but the bolts in the hinges can come loose and cause the lid to be off kilter. I would check all the bolts to see if they are tight.

I think you should buy repair manual first for your vehicle after that it will be easy for you to solve the problem. Check the link may be you will find something useful here Mercedes Benz CL CLK Maybach SL Class Complete Workshop Service Repair...

try wd40 on the lock and cable. it could be a kinked cable holding the lock open. lock may be worn out. replce with new.

You can adjust the trunk lid by loosening the bolts at the hinges. If that wont work then there is a micro switch incorporated within the trunk latch. You will need to replace the entire latch unit unfortunatly.

Hi, try loosening the catch on the trunk lid but do not remove it and the lock mechanism, close the trunk lid but not fully, then pull the backseats down and climb into the trunk. Adjust the lock and latch until they meet up and lock together ( This will take some time and patience is essential). Fasten the Catch and Lock back up. Then retry opening and closing, if it still doesnt fit just do the same again, just needs a bit of adjustment.

hope this helps. jonno

Fold down rear seat and climb in the trunk....there is a manual release at the center of the trunk lid. (mandated by the government to kids don't get trapped in the trunk).