I need to replace a leaking valve core on the high side AC service port of my 99 W163 and was looking to find out the correct size/type valve core that I will need to order for a R134a system. Existing hi-side valve has a smallish leak and will use one of those valve core installers that allows to swap out the old and new valve cores without loosing the system charge. I did already try "bliping" the valve to clear any debris that might be causing the seal not to be seating properly, but that did not help.

Has anybody done this job on their MB car and could please give me a hint as to where I could get the right valve cores for both the High and Low side ports? I am not in the US, so can't unfortunately use any walk-in store recommendations as I will need to be able to order online instead.

Looking at ebay plenty of those valve core installer tools available and some even do include a small assortment of valve cores. However no way to know if any of the included cores are going to be the right fit until after I have removed the existing leaky core. So would be nice to be sure even if I have to order the correct cores separately.

Thanks in advance for any leads.

__________________
W163 ML230 EURO SPEC 1999
W124 300E 1986