They sure did blow that 116 body up using freeze 12. Anyway the point is you get what you pay for so there is no miracle low price freon. You do the job right the first time or you work on it year after year . Logically it would be less expensive to fix the system properly the first time . Like I have said before ask the techs they have the most experience in this field. I can gaurantee the techs that have worked on mercedes most of their lives will tell you to stay away from this junk.
