access

Can anyone advise how I access/remove/replace the entire cigarette lighter unit on a W210 Mercedes E Class Estate? I have purchased a replacement unit and just want to fit it. Any guidance would be most appreciated :)

I can imagine getting to the fuse box it going to be a pain but what is the easyest way of going about it.I need to get a couple of wires from the instrument cluster to the underside of the fuse box for power (OEM way) then down to the front of the car.