V50 Engine 2.0D : Starting Problem

[KrisSWFC]

Any advice greatly received!

My 2007 V50 2.0D has had an intermitent starting fault since last Autumn on6000 miles and is still happening now on 36000.

Whenever it is wet the car either just turns over but doesnt start or fires up and the revs are very low and cuts out about 5 seconds later, if you then try to restart it fires up first time ands runs perfectly.

Two different dealers have looked at it on the last couple of services but as no fault codes are showing up they are non the wiser.

Whilst its not a major problem I want it sorting as the car is due for a service shortly and I want to push the dealer in the right direction!

Any ideas?

Thanks in advance