The A/C system in my E300 isn't blowing cold air. I'm pretty sure its got a leak on it, but haven't pulled any codes for diagnostics yet to really determine. I realize this is faux pas, but my mechanic and I filled up my completely empty sytem over the weekend with fresh R124. 2lbs in total. Everything worked great once the system was recharged. Ice cold. Where are some common areas on the A/C system to cause leaks? Can these leaks be fixed via DIY, or should I have a pro do the job?

The compressor/dryer has been replaced on the S500 3 separate times! My hope is that this isn't the case for the E300.

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Ed
-1984 Mercedes 190D 2.2 5-speed gray market(bought@30,000 miles) (Sold back to original owner@170,000 miles)
-1999 Mercedes E300DT (245,000 miles)
-1999 Mercedes S500 Grand Edition (80,000 miles)