Is there a break in of the engine needed before I start trailering things? Thanks.

After the initial 'running in' period the answer to your question is no. If the trailer load is heavy, select first gear manually to start off and then just make sure the engine is not having to work too hard, particularly when travelling up hill. If necessary select a lower gear manually. It's just a case of not giving the engine a hard time. Gone - 2008 TDV8, Stornoway Grey, ebony, zabrano trim, TV, Tasmods, mudflaps.