ac charging
 

Hello to all, i just purchased an artic charge kit, it has the plus sign at the end of the number, wich if im correct is 134, but my question is im not sure where is the knob so i can recharge it on my car, i have a 2000 aufi tt, 1.8, i found this little green knob but i tried inputing the charging kit there and it does not read it on the gauge, any sugestions, i have tried google as well, but they never lead to tts, many thanks in advance.