Hmm, if you leave the key "on" with door closed doesn't the parking brake stay disengaged?
Use this procedure through module 03:
http://wiki.ross-tech.com/wiki/index.php/VW_Golf_VII_(5G/AU)_ABS_Brakes
Use this procedure through module 03:
http://wiki.ross-tech.com/wiki/index.php/VW_Golf_VII_(5G/AU)_ABS_Brakes
OP is asking about the VCDS operation to fully open the parking brake for service, that's different than parking brake "off".
53 isn't an installed module, so you won't get a response.