Feature●If there is a DSP button in your factory radio or your car has a digital sound system such as Harman-Kardon or Bose, you can buy this BM6M extension wiring harness to change the speaker connection●100% brand new and high quality. Suitable for Benz E/G/CL/CLS/S Class W211 W463 W219 W215 W220 Universal for all types of car multimedia units Plug and Play 6 m long cable Fakra radio plug including plug●Box contents: 1 x 6 m BENZ power extension wiring harness, 1 x 6 m Fakra wireless extension wiring harnessDescription