I had a letter when I placed the order (25th Jan) and then another letter stating it had left the factory (15th Feb) Picked mine up on 8th March and by all accounts my order jumped the queue a little for some reason.
A lot of it depends on the build slot, if you ordered in February then I believe it gets a March build slot, that could be March 1st or 31st depending on other orders. On the plus side I was told March builds get the DAB radio.
The dealer should be able to give you a target date for when it leaves the factory, every order has this but can fluctuate.
Hope this helps
DS4 HDi 115 DStyle Polar White - Gone!
Mercedes C220 Sport :-)