You'll need to Google for a fuse layout diagram for your W205, unfortunately I don't have that info.
The facelift had Apple CarPlay / Android Auto as an option (on the pre-facelift there was no option for this), but you'll need to check if this option was actually fitted to your car from the factory.
Run the VIN in a free online VIN Decoder such as
Free online Mercedes-Benz VIN Decoder : MBDecoder, it will show the full list of options that were ordered with the car, then look for these options:
16U Apple CarPlay
17U Android Auto
If your car does not have these options, then they can be retrretrofitted. You can talk to forum-sponsors
www.comandonline.co.uk about this, though I appreciate they are not near you (you're in Manchester and they are based near M3 J3).