I have an X Reg Kangoo van, 1.9 diesel. I have starting problems every winter and have replaced battery, earth straps and glows plugs.
I have a starter/charger to give it a huge boost which often helps but I find the most reliable way is to rest a 3Kw fan heater so it is pointing towards the glow plugs/injectors/cylinder head and leave it for 15 to 20 mins to warm things up. It then atrts every time.
I don't know what the fault is but it must have something to do with some temperature sensor. Hope this helps.
webtrekker, January 2010