HVAC Binary Switch. Global Parts Distributors. In earlier vehicles, they are used to directly turn the compressor off to avoid compressor failure. 207776, 20965, 29-30219, 2930219, 43-MT0616, 43MT0616, E95-1113, E951113, MB276842, MB609936, MT0616, MT0616-10, MT0616-20, MT0616-5, MT061610, MT061620, MT06165, SW10037.