Task: Explanation
Input (English): The second generation of the Mercedes-Benz CL-Class is the C215-chassis coupé of 2000–2006. It is based on the 1999–2006 Mercedes-Benz S-Class (W220), though it rides on an 8 in shorter wheelbase. Sales in Germany started in August 1999 for the CL 500 V8. Question: What was the first flagship sedan of the class of Mercedes-Benz which preceded the Mercedes-Benz CL-Class? Answer: Mercedes-Benz W220
Output (English):  It is based on the 1999–2006 MercedesBenz SClass W220, though it rides on an 8 in shorter wheelbase.