sorry larry, i'm trying to kill several birds in one stone.
all my MBs are 134a compliant, but my other vehicles are not.
since R12 is no longer available in canada for several years
now, i traveled to washingston state the other day to
get some quick fix of R12, but to my surprise neither is it available.
hence, the need to evacute and clean the system.
the retrofit here is cheap ( under $300 ) but would rather
do it myself where possible. thanks for the concern.
Prayers bring forth enlightenment.