I tried to figure out the maintenance ratio on my 240D a while ago. I decided it would be too much work. I did notice from my little record book that the car has been worked on over 50 times (mostly by me) since I bought it 17,000 miles ago.

Due to the amount of time it's been down, I think my 250 has more hours of maintenance into it than hours of operation since I bought it.

The 300D is considerably better in that respect.

They are all way ahead of aircraft. I saw in a documentary that the F14 took about 12 man hours of maintenance for each hour of flight. Its replacement the F/A-18 has that down to about 5.

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Whoever said there's nothing more expensive than a cheap Mercedes never had a cheap Jaguar.

83 300D Turbo with manual conversion, early W126 vented front rotors and H4 headlights 401,xxx miles
08 Suzuki GSX-R600 M4 Slip-on 26,xxx miles
88 Jaguar XJS V12 94,xxx miles. Work in progress.
99 Mazda Miata 183,xxx miles.