Correct, horizontal to work with the central locking system. That is, if the central locking system is working.

As for specs, horsepower is 123 at something like 4000 rpm. Torque I forget the exact number but it's in the high 100's (I think). Your diff should be a 3.07.

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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.