Mercedes 123 240 Euro 300 New Genuine Heater Motor Speed Control Switch

For lever operated (round knob) blower units only. Works on all 240D from 1977 to 1983 and Euro 300s. This is the switch that is mounted behind your center heat control knob. If your heater motor runs with you power it directly with 12 volts, but won't run when you turn the knob - then this may be the problem.