The 240s all had no clutch on the fans, AFIK. ( I have had close to a dozen 240s).

You don't wanna run any mercedes without the thermostat, they will overheat when you need them to be cool and run cold when you want them to be hot. Just a very bad idea. They will not cool anywhere near their capacity without the stat. At least half the coolant will circulate right back to the head without ever making it to the radiator.

Tom W

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[SIGPIC] Diesel loving autocrossing grandpa Architect. 08 Dodge 3/4 ton with Cummins & six speed; I have had about 35 benzes. I have a 39 Studebaker Coupe Express pickup in which I have had installed a 617 turbo and a five speed manual.[SIGPIC]

..I also have a 427 Cobra replica with an aluminum chassis.