Features: Upgrade your C Class W203 ( 2007) or CLK W209 with this OEM specific 4pin auxiliary cable (A2034401808), designed for seamless sound integration and stable signals transmission through erosion resistant copper wiring. Crafted from strong rubber housing and premium copper conductors, this black 4pin interfaces cable resists wear, deformation, and signals interference while maintaining precise compatibility with factory radio systems. Ideal for owners seeking to modernize their 2007 W203/C Class or W209/CLK models with smartphone/music player connectivity without compromising original electrical configurations. Transform your daily commute or road trips by connecting MP3 players, phones, or sound devices to your car stereo via this plugs and play auxiliary input solution, restoring crisp sound quality to older infotainment systems. Engineered exclusively for input integration, this direct fit cable eliminates compatibility risks associated with general adapters through precise 4pin terminal alignment and grade construction matching A2034401808 specifications. Specifications: Component : ABS Part number: A2034401808 Length: about 90cm/35.43inch Package Includes: 1xAudio Input Cable note: 1.Please allow 1-2cm errors due to manual measurement, make sure that you do not mind before you order. 2.Due to the difference between different monitors, the picture may not reflect the actual color of the item.