Specific wiring harness for retrofitting the automatically dimming exterior mirrors for Mercedes Benz The exterior mirrors darken automatically in light conditions (e.g. rear lights) Suitable for the following vehicles: Mercedes CLA-Class C/X-Series 118 Mercedes CLA-Class A series W177 Selectable option: Blind spot (code 234) available Blind spot (code 234) not available Package includes: Wiring harness Note: Mirrors are also required