In 2003, the cars were upgraded with Pre-Safeprecrash system and a newer electronics package that included a DVD-based navigation system instead of the CD-based COMAND system. Also, the engine options changed. The CL55 AMG became supercharged allowing the car to accelerate from 0-60 mph in 4.27sec according to Motor Trend and the V12 CL 600 had turbochargers added and a slight engine reduction, from 5980 cc to 5513 cc. Both cars produced 500 PS (368 kW; 493 hp) the distinction, again, was the quietness of the CL 600 as compared to rather noisy CL 55 AMG. The more powerful CL 65 produced 612 PS (450 kW; 604 hp). The top speed of the car was limited to 250 km/h (160 mph).
