What was the first flagship sedan of the class of Mercedes-Benz which preceded the Mercedes-Benz CL-Class?
Mercedes-Benz CL-Class (C215): The second generation of the Mercedes-Benz CL-Class is the C215-chassis coupé of 2000–2006. Mercedes-Benz CL-Class (C215):  It is based on the 1999–2006 Mercedes-Benz S-Class (W220), though it rides on an 8 in shorter wheelbase. Mercedes-Benz S-Class (W220): The Mercedes-Benz W220 was a series of flagship sedans which constituted the Mercedes-Benz S-Class during the early to mid-2000s.
Mercedes-Benz W220