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How old are we talking about here? If you have power brakes then when the engine shuts off the brakes don't work at 100%. At that point you're needing to push the hydraulic fluid without assistance and you'll find it's really not easy to stop. Also no power steering. A windy mountain road is not a good place to be...

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At that point, engine brake with the clutch.

Unless you're driving an automatic.

I'm pretty sure my old car's owner's manual specifically said that engine braking effect can be increased by downshifting the automatic gearbox to a lower gear in the manual mode. Current car's owner's manual says to release the accelerator when approaching red lights to "take advantage of engine braking" and since it's a hybrid, it also does regen.

There's also quite a few different ways to make an automatic gearbox, such as double-clutch gearboxes.

That's what my car's manual said, too. But the "lower gear" in Drive mode was electronic. It didn't have a dedicated "low" or "2" or whatever position. On my dad's Toyota it's even worse, the "gearshift" is fully electronic.

There's always the handbrake.

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