Well as usual, nobody at the dealership wanted to know without wanting to sting me £90 plus vat per hour to take a look - honestly - would it kill them to take a quick look for a frequent and loyal customer! The pump in the boot is making it's usual noise but I'm wondering if it's suction ability has deminished so much that it's not working properly. Does anybody know whether, if I take the air line off the pump, whether I should be able to feel it sucking air when it's activated, or whether it blows air? It seems to be doing neither.