The massive, muscular body of this German SUV is always eye-catching. Renegade Design presents the lower spoiler for the Mercedes-Benz GLS X166 to give the vehicle a sporty flair. The lower spoiler is not as eye-catching. It is a narrow, trapezoidal in section, a strip lurking under the rear wiper. The spoiler is made of composite material, lightweight, durable, resistant to temperature changes and moisture.