Trunk lid will not close. motor is not catching. Motor is not functioning.

does the lock unlock function work? if not you need to reprogram the key fob most likely. does the "B" on the boot(trunk) lid open the trunk? if not but the lock unlock function works on the key fob you most likely need a trunk(boot) motor or latch

Once the lid is latched there is a motor that pulls the latch assembly down to finish closing the lid.

I would check the latch mechinism make sure it's not moving around on you like the bolts have loosened or that anything is bent. Also there is a switch in the mechanism that activates it to finish closing as well, open the trunk and close the jaw on the lock with a screwdriver or something similar, and see if you can hear the motor run, if not I would place blame on the switch or the motor itself. And as always I would check for loose / broke wires or a bad ground in the immeidate vicinity of the mechanism.

The trunk latch contains a switch which closes when the trunk lid is pushed closed by hand, then this switch sends power to the trunk lid pull down motor which then finishes closing the trunk lid. Often the switch or motor will go bad and the whole thing will stop working. It takes a little testing to figure out which part is at fault but they are usually quite easy to fix.

Assuming no accident damage check the catch itself in the trunk lid, using a screw driver try to toggle the lasch, it should be rfee but has a strong spring to pop the lid up when opened, also try spraying some penetrating oil as likely it has become sticky with age and water.

If you mean automatic closing check at the latch area inside trunk and look for wiring going to a motor that would pull the trunk lid down when latched.I am almost sure only the 98 series had auto close function.

i had the same problem, there is a stop switch that is bad. (got one from a junkyard but it was bad also). haven't found one online yet, but will ask my local ford dealer if part is still available.
so untill i find one, i got the motor to stop at the all the way down position (trunk closed) and then unpluged the motor.

did it quit making the noise when you lightly push down on the trunk? most people slam these trunks and your not suppose to you are only to put light pressure on them and they pull it closed theirself.. you might check your relays under the hood and look in the box lid to see which one it is.. if this is not the problem you might have to replace the motor to the latch .. you might check with a test light to see if there is power to the motor first though .. thanks and holler if you have more Jerry .

I had exact same problem, but what I found out was a three step solution to the problem.
1) The trunk lock above the trunk lid tself - sometimes looses coiling retention for the lock to work properly, which in effect does not properly lock wrap around the pull down electronic unit located in the body of the car/trunk that catches and pull the trunk lid down SOLUTION: check and make sure lock is works properly. you cab check by opening trunk and locking it with remote key, then pry the lock with a screw driver to see if it unlocks or stays locked

2) The motor catching unit in the body of the car/trunk that catches the lid and draws it down can be off balance (sitting too low to catch the lock (upper trunk lid with lock) to pull it down and stay locked. Have a mechanic - Audi preferrably, check the positon and allignment to adjust it, so it can catch trunk lid and lock to stay locked. HOPE THIS HELPS!

prbably looking at replacing the motor and gear assembly, gm had lots of problems due to slamming of the lid too hard

The Roof Mechanism works with two motors similiar to the ones that wund the windows. Now the two mechanism are located in the left side of the trunk. 

The trunk wont open Because of the roof lid that is not closed properly. How you can test this is to press down on the right sid of the roof lid and then try to opne the trunk.

Now the reason that this is happening is that the roof lid is not closing properly nad pressing on a small orange buttin located just below the right hand side roof lid catch. How you are going to remedy this problem is to adjust the cable tension to close more securely.

Now the two motors in the trunk that works the convertable roof can be engaged and disengaged on motor works the roof lid and the other one the roof.

You need to get these motors in sync so that they open and close the roof in the correct order.

That is if the electric are still working.