No cold air.
Mercedes-Benz Q&AAsk Your Question
1990 Mercedes-Benz 300SL Question: Hi, where is the low side r12 charge port? Thanks
Answer #1Greg's Orange Auto (14968 Answers) , Orange, CA - (714) 361-9386globalhelper August 23, 2012, 15:35Master
its the smaller of the 2 fitting and its located around compressor area. poss on compressor or low pressure line
Answer #2pushrod August 23, 2012, 19:21Master
May want to take it to a ac shop. Low side fitting larger of the two
look on the larger hose that goes into car.