Audi A6 2003 Boot/trunk will not close.

the boot latch may have failed or siezed. the boot light is turned on /off by the switch in the latch try putting some wd40 or similar on the latch mechanism to free it off has it got a cable release lever inside the car some did that may have stuck/siezed keeping the latch unlatched

• Press down on your trunk, and have somebody release your trunk's release mechanism from inside your car simultaneously. These systems can become jammed but can sometimes be released if a gentle downward pressure is applied to your trunk while the mechanism is being activated. If this is the problem, apply some lubricant.
• Clean the latch and the area where it connects to the chassis. If dirt or debris has become lodged here, it can stop the latch from connecting properly. It's a good idea to vacuum the area to ensure no small bits of gravel have become trapped and stopped the mechanism from securing properly.
• Examine the latch and the area where it connects to the body of the car. Either of these might have become bent out of shape or damaged in some other way if the trunk has been shut with an obstruction in the way. If this is the case, contact your vehicle's manufacturer or a local garage to find a replacement if the elements cannot be repaired.

Check the latch mechanism, it may have accidentally already be in the closed or lock position. If it is, you will have to pry down on the latch tangs with a screw driver while pulling latch handle to the open position.
Latch could also be seized, in that case , use a thin oil liberally on latch mechanism, and work the mechanism open and shut closing and opening with screw driver and boot handle.

How to fix trunk that won close 2006 2008 civic for less than 5

The latch mechanism may be broken, stuck in the closed position or may need adjusting. Spray the latch with WD40 and try working the catch back and forth. It may be dry but could be worn out.

there is a switch built into your latch that senses if the trunk is open or closed. You might try spraying the latch with WD-40 and working it back and forth, it might come out of it. If not you will probably need to replace the latch assembly as the switch is not serviceable separate.

either the wires in the rubber boot from the door to the door frame are damaged or their is a wiring plug off in the tailgate door itself or the lock has gone ,its a strip and play job to find the fault

try to spay some WD40 on the mechinism and see if it helps ... if it works and the boot remains closed then open it and lubricate it with some lithium grease (comes in a spray can.) Do the bonnet latch as well while you are at it.

Hi spray the lock and the mechanism with WD40 dont be shy with it, ensure you spray the underside of the boot lid where it meets the lock, the electric motor may be struggling to open without the key, spray everything and repeatedly lock and unlock with both the key and the remote after a while it should free off, if the lock is stiff then the motor will not be able to force the latch over and open the boot.

It is very common on mercs, like I say dont be shy with the wd40 it normally fix's this fault.

Regards
Dan

Try spraying WD40 directly into the door latches and opening and closing the doors several times. Usually this will free a sticking door ajar switch.

latch may need some wd40 spray.

your local buick dealer should be able to get a new latch for you.

Try pushing the button under the dash back into its normal 'unactivated' position, and see if the trunk will latch shut. It could be a sticky latch mechanism in the trunk, which some silicone lubricant or WD40 might help to free up. Check also that the latch has not actually returned to the 'locked' position prior to trying to close the trunk. That would definitely stop you from closing the trunk properly! Try unlocking the trunk latching mechanism again.