The CLK is designed to fill the mid-luxury market position for coupes and convertibles. It is Mercedes-Benz’s only 4-seat cabriolet.
The Electronic Stability Control (ESP) and Anti-lock braking system (ABS) are both aids to handling, making such feats as a 90’ degree turn on a typical two lane intersection from 50 mph (80 km/h) possible using simple hard braking and turning with no significant fishtailing. The ESP system cannot be turned off - it makes intentional high-power fishtailing impossible without using a factory test protocol that end-users generally cannot enable.
The cars have a manual sport/comfort mode switch that sets the automatic transmission to start in 2nd gear and shift earlier in comfort mode. With the new 7-speed transmission, the car is about 20% more fuel-efficient compared to the 5-speed, with no loss of performance.
Source: Wikipedia, 2012