After Label Red, BMW to add 50e to XM family

BMW quietly announced a new XM variant dubbed the XM 50e on the sidelines of Tuesday’s reveal of the XM Label Red range-topper. The XM 50e was announced via a teaser video and is thought to feature a 6-cylinder engine instead of the V-8 fitted to the Label Red and the original XM variant announced last fall, whose model designation is yet to be…