I am sorry UKNeil due to the age of the car and the dealerships really not providing any support anymore we are on our own. The people here can lead you to repairing it yourself or if you have a friend like I am to my friend to repair it for you. They can help you do anything. Trust me I have had many issues with my 05 SRT and this is the place I come to get the solutions. I have found them all here.
Good luck. If I was in Worcester I would help you out.