I think the bolt pattern for those is different.

If you're going to do a non-bolt in, you might want to start with an old Suzuki 5-speed. The one in my Samurai was the smallest five-speed I ever saw. An adapter plate and maybe a custom crossmember adapter would get it in the car. Getting the Suzuki input shaft and clutch to talk to the Mercedes flywheel could be a little more challenging.

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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 400,xxx miles
08 Suzuki GSX-R600 M4 Slip-on 22,xxx miles
88 Jaguar XJS V12 94,xxx miles. Work in progress.