One problem related to air bag not deploy has been reported for the 2009 Mercedes Benz Cls Class. The most recently reported issues are listed below.
Airbags did not deploy with crash in 2009 clk 550 mercedes. Impact was at 50 miles per hour and struck the front drivers side bumper. The bumper was on the ground and the aluminum frame bent. Restrained by seat belt, my daughter's head struck the steering wheel and suffer from whiplash. Please note that this vehicle is a clk 550 not a cls - there was not an option to pick the vehicle.