Mercedes W205 2015 C220 Dieasel DLC Communication Issue

Hi.
I have 2015 C220 diesel front end smash driver + knee airbag deployed.
I am trying to scan the car with Xentry Passthru 2016 using Bosch VCM II.
Selected car and when scanning it kicks me out saying battery voltage can not be read and you can not do the battery tick option.
Error is GAL failed to read battery voltage.
VCM II has power when you connect to DLC, checked fuses that i can find, they seem ok.
Is there a pyro fuse that shut down power to DLC as i can't see a cable running from battery with a pyro charge on it?
Any help would be great.
Thanks.