Changing belts may not be an easy or appropriate task in an emergency. A temporary belt such as a shoe lace should be in every emergency kit and you should practice using it before a real emergency. The most critical belt is the water pump, since you cannot drive more than a few minutes w/o the engine overheating. I had a water pump belt break on a Peugeot diesel long time ago, didn't know the shoe lace trick. I drove it home by watching the temp gauge, as it gets to above normal, I'd pull over, pop the hood and let it cool off and drive again. Got home eventually w/o damage to the engine.

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85 300D turbo pristine w 157k when purchased 167,870 July 2025
83 300 D turbo 297K runs great. SOLD!
83 240D 4 spd manual- parted out then junked