The ONLY way to know for sure is with the use of a Refrigerant Identifier. Most anyone who does any volume of auto refrigeration work will have one. Fittiings installed mean nothing, in spite of the fact that Federal Law requires that the appropriate fitting for the refrigerant used be present. Too many rogue conversions out there for this to be reliable.

Call your local shop and ask if they have a Refrigerant Identifier.

__________________
2001 SLK 320 six speed manual
2014 Porsche Cayenne six speed manual

Annoy a Liberal, Read the Constitution