V70: Handbrake control module

[Mrhitman48]

Hi All
Looking for your advice, or input, I have just had to do the rear brakes on my v70 2008 estate, it has an electronic hand brake, I have my own diagnostic system which I used to put the handbrake into service mode, which wound the motors off, however after doing the job, I tried to take the service mode of or deactivate the service mode, but the car will not come out, of the service mode, meaning I am unable to use the handbrake, also I have a warning on the dash that the handbrake isn't released but I know it is, my fear is that the handbrake control module has gone down, there are 2 with identical part number on ebay, one from a 2lt deisel and the other from a 2.4, both the same year, 2008, mine is a 2008, my question is, if I purchased one ot these handbrake modules, are they plug and play or do they need coding, as the new/second hand unit will be identical to the one I will be changing.

Thanks Paul