Last Friday I collected a 2006 motorhome based on a Renault Master 2.5 with 25,000 miles from a reputable dealer. From paying the deposit to collecting the vehicle took six weeks because I noticed when I viewed it that the air conditioning was not working and asked for it to be repaired before collection. I also required the cambelt to be replaced along with water pump, tensioner ands pulleys. The price was £24,000. On collection the engine blew out a lot of grey smoke as I left the premises and the air con was still not working. It is now sitting on my driveway with a flat battery waiting for the dealer to come and pick it up. He wants to repair it. I now want to reject it. Where do I stand?