This thermostat housing is compatible with models including CLS (C218 and X218), E-Class (W212, S212, C207, A207), SL (R231), and GLE/GL/GLS/M-Class (W166, X166, C292) vehicles equipped with the 5.5L M157 engine.It is designed to replace part numbers A2782000615, A2782000415, A2782000715, and A2782000815.Fits CLS 500, CLS 63, E 500, E 63, SL 500, SL 63, G 63, GL 500, GL 63, GLE 500, GLE 63, GLS 500, GLS 63, ML 500, and ML 63 models produced between 2010 and 2019, as specified by the applicable model codes and production date ranges.This part restores function and fitment for the thermostat system.