2000 E55, 2002 E320, 2001 E320
Hi, when I was adding r134a to my air conditioner through the low pressure port I lost the cap. What size cap is it? I tried the cap from my Mazda but it did not fit. My local Autozone and Pep Boys say they don't carry the Mercedes size cap but I have a feeling they do, or I can find one online. Any help if much appreciated.