Mercedes w163 A/C High Pressure Switch GENUINE in Compressor to Condensor line Pressure Switch in A/C Line from Compressor to Condensor. part# (163 542 04 18). Fits: 163.154: (1998-2003): ml320 Fits: 163.172: (1999-2001): ml430 Fits: 163.174: (1999-2001): ml55 amg Fits: 163.175: (2002-2005): ml500