I like that body style Jag convertible.
And only 52k Miles !
But not in those colors .
MAF's can cause a world of unsuspecting symptoms sometimes.
Worked on a 98 TDI that had a terrible low power gremlin - only happened on initial start up and first acceleration.
After it hit 2200 rpms the first time it would run perfectly thereafter.
Until you turned it off and restarted it. Same drill.
After a barrage of tests and diagnostics getting nowhere , swapped out MAF from another TDI just to say I did ,
no more problems .
damn cars are crazy
Good Luck with your MAF