Hi , I have been having similiar problems so I will give the Heated screen program a go. Its probably never been used out here!!
If I am reading correctly as I have a 4.2 S/C it wuold have come with all those things mentioned  2006 4.2 S/C with Tow Pack, Side Steps, DRL's, 19" & 20" wheels, additional 110 ltr Fuel Tank Roof Rack and performance mods.

1952 Rover 75 (Cyclops) First Car !!! Fond memories -was restored-good for 93mph.

I hope I've ordered the correct alternator I know it's a cheap one but it will have to do for now photo of the item my dad is a retired mechanic he has spoke to them and they asked about dsc I said no hope it's right "Remember its easier to say sorry than it is to get permission " especially off the Mrs !!

Don't go cheapo on the alternator it will bite you, get the Denso or Densa brand its the one to have (can't remember what the correct name is) but hang around for 5mins im sure someone will update me  2007, HSE, Cairnes Blue, Factory tints, Love it !!!

I'm afraid it's all I can afford with the battery as well especially this time of year lol "Remember its easier to say sorry than it is to get permission " especially off the Mrs !!

The only problem with a cheap alternator is they can cause more issues than they solve id leave the battery for a bit and get the better alternate first. They are worth it!

the place I bought it from manufacture them here's a link seem very knowledgeable when I rang them this fits models without ace

http://www.ebay.co.uk/itm/LAND-ROVER-RANGE...SwhOdXoeUc "Remember its easier to say sorry than it is to get permission " especially off the Mrs !!

Purchased a voltage reader you can put into the cigarette lighter. This morning it read over 16 volts for a few mins then settles around 14 volts. Got it booked in next week for new alternator.