Replacing the two hoses (15) connected to the cooler tube (16) on 91 500SL. The discontinued part # is 0199974282 from Mercedes. I ordered 2019970382 (9.5 x 3.0 mm) from pelican parts as they have this listed as the low pressure return line. I have found this to be somewhat smaller in inner and outer diameter than the original hose and very stubborn to go on. Anyone who has replaced these hoses, can you confirm if I have the right hose?