Don't try to limp home when an engine is overheated and leaking coolant.
The stakes are just too high.
I have the cracked heads to prove it.
If it's a slow enough leak, let it cool down, top it off with water (very slowly, just to be safe), then try to limp home before it overheats again.
Carry extra water if possible.
Do not push it to the red before stopping again.
1986 300E 5-Speed 240k mi.