Update:

I got the car jacked up and checked some things. Some mental genius decided to fill the jack holes with some sort of blue goo. There is no trace of the rear jack points, and the front ones are now too small to use with the OEM jack. I got a 2-ton bottle jack from NAPA, along with spare 17 mm and 19 mm wrenches (so I can do the two-wrenches together thing) to replace the missing tire-changing wrench.

Front brakes were checked. Rotors are a bit wavy, but there is plenty of material left on the pads. The slave cylinder is done. I have a new one on order and it should be here Tuesday. It's leaking brake fluid into the bellhousing, so after showing the car off by driving my co-worker with vehicle problems to work tomorrow, the car will be grounded until I get the new slave cylinder in.

I looked in the owner's manual, and the original owner wrote his name and city in the front pages. He's probably not living anymore, but I'll try to look him up anyway to tell him where his car is. There are also some records of maintenance, with a gap from 1980 to 1993. I'm thinking the car may have sat in a barn or something for 13 years. NBFD, my '63 Dart sat in a barn for 20 years before the owner before me revived it. The car racked up a LOT of miles between '77 and '80. Records show that the clutch was replaced at 196,000 miles. It currently has a bit over 218,000.

Suspension rubber is not new. It's soft and pliable, however, so I dont' think it's original.

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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.