Glow Plug fuse X5 3.0d

Hi, I've got an 05 X5 3.0d M57N and I have an amount of white diesel smelling smoke each morning on start up. I've read a few threats that suggest it may be a glow plug issue. Before I start tracking the problem from the Pre heat relay to the plugs can anyone tell me if the curcuit has fuse protection up stream of the relay. I have no indication on the instrument cluster to tell me if the pre heat system is working. Its mid winter here and with temps near zero degrees (celcius) I have no indication if I have pre heat on start up. The manual tells me there should be a DDE light however I've never seen it despite the cold ambient temps so I suspect a glow plug related issue. Smoke clears after a very short time and I'm not using excessive oil. No smoke once she's warm.

Thanks