Mercedes E230 saloon - jimmy464
This might seam like a simple question, but where abouts is the fuse box?
thanks
Mercedes E230 saloon - Aprilia
There are several fuse plates and relay units.

Assuming its a W210 series then one on drivers side engine bay (towards the rear); one passenger side (toward rear) and under rear seat.
Mercedes E230 saloon - elekie&a/c doctor
There is also a small fuse box at the end of the dash by drivers door for the lighting circuits.