Webasto HL18 manuals added to reference pages

Not entirely Sprinter related but again I’ve fitted one of these diesel air heaters to our van (kindly donated by a friend) so I’ve added the manuals including the service manual online here. it’s a great air heater for the money, reliable and easy to service.

Ours is currently mounted to the top of one of the rear wheel arches with the exhausts emerging in the when arch at the rear of the vehicle.