Lexus LS 600h L 2012 Owner's Manual page 543

5-2. Steps to take in an emergency
STEP 4
STEP 5
540
After the hybrid system has cooled
down, check the engine coolant
level and inspect the cooling sys-
tem for leaks.
If the engine compartment cover
needs to be removed: →P. 441
Add engine coolant if necessary.
Water can be used in an emer-
gency if engine coolant is unavail-
able. (→P. 551)