Put my 05 S into front end mode to replace the alternator at 138,800 this weekend and saw this leakage on the left side of the condenser

unit for the A/C
Is this a seal that needs replacing ? I was going to recharge the a/c unit since it's no longer producing cold air but now I'm wondering if this is an issue that someone has experienced before.

Thanks in advance!

Buggy

 

That is the AC Drier. It just unscrews off and another one installed. Have to evacuate the frein though.

if Ac is working. Motor on.

 

Many, many thanks for your sage advice. Think I will leave alone for now since the A/C is fine. Have a GREAT DAY!!