Rear 12v socket not working - 2013 E Class

[Chris200]

Howdy all, my 12v socket in the rear of the car below the rear zonal heating controls in my 2013 E Class appears to not be working.

I'm guessing it's a fuse, but does anyone know where the fuses are and which one it might be? Only had the car a week or so.

[daveenty]

Not sure which fuse it is though there should be an allocation chart in the spare wheel compartment.

I'd be tempted to just take it back to where I bought if from and make it their problem though. Obviously distance matters here...