Sorry flyrobbie, the old one went straight to the big pile of switches in the sky, so I cant help with opening it up i'm afraid.
On a more positive note though, we did 650 miles to Lands End and back on the B-roads over the weekend, roof down the whole way, only putting it up at coffee stops and overnight, and i'm happy to report zero issues, no warning bongs of any kind (other than fuel...

)
Out of interest, we averaged 31mpg for the whole 650 miles, mixture of A303, A30 and the twisty back roads across Cornwall, that sound about right to people? I have the N52 2.5 in mine. Manual box, on 19's