If you have a W123 then that is common, almost normal. {with any refrigerant}


Same pretty much for pre-'93 W124's too I believe. Especially if converted to R134a. {since I was able to read your mind}

Put your car in your signature or in the body of your question. It is a pain to have to go look at your profile to find the info, and annoys those above who are most likely to have your information.

__________________
Jimmy L.
'05 Acura TL 6MT
2001 ML430 My Spare

Gone:
'95 E300 188K "Batmobile" Texas Unfriendly Black
'85 300TD 235K "The Wagon" Texas Friendly White
'80 240D 154K "China" Scar engine installed
'81 300TD 240K "Smash"
'80 240D 230K "The Squash"
'81 240D 293K"Scar" Rear ended harder than Elton John