The way you have to look at it is that the thing is broken anyway and its worth a shot.
you will need
A soldering iron with fine tip
Multicore solder (fluxed)
Feeler gauges (you will see why)
Nerves of steel
Here goes,
Its in tight a good tug will release it
Thats the back clips off now the front ones
put your fingers down left hand side and pull like your life depends on it. Its in tight so nerves of steel required, you wont break any clips (Trust me)
And pull
Thats one side done now pull like crazy on the other side its in hard..... be brave!
Now with surround out disconnect the wiring harness plug from clock
Now removing clock itself is tricky, get some feeler gauges and slide them in side shown in picture
This is in really tight and twist it so you are forcing gently the clock unit backwards away from the surround not up or down
this is in really tight be brave and be carefull not to lever in the front part of clock housing as this is the screen
once you get this side out the other side will come out using a bit of tugging bend the clip back using fingers and out it pops
Now seperate the face from the back do this on a table not in the car as the buttons will fall out. just move the tabs gently up these are brittle so be careful
see tabs just lift them gently and pull face off
see resistor pictured left R510
see resistor pictured left R510
Now once inside you can see resistor pictured with ball point pen this is the one, use a fine tipped soldering iron and a dab of solder on the end contacts. It will look like nothing is wrong with it but if you wiggle it you will see which side is loose but i re did both as a precautionary measure.
Now pop it all back together and try it out
It worked for me
however i cant be held responsible for your own actions and damage caused be carefull and if in doubt ask a grown up for help and dont burn yourself soldering irons are hot!
Best of luck feel free to add your comments