So... My parking brake malfunction came on two months ago, it award intermittent for a week or so then stopped working all together. Computer Faults threw up faults relating to rear left caliper/motor  so I changed motor & plug, still no joy. Changed module and brake button itself, still nothing stripped loom back at button and tested all wires from button to module and module to calipers and all have continuity  .

fault codes are 02442, 02432& 00446 

really have tried everything and as of last night the right hand side handbrake now works but left hand still doesnt. 

 

Any ideas???

Sounds like you've done everything you can. I'd definitely recommend you get a garage or auto electrican to take a look