The original speaker brand of Mercedes-Benz ML is Harman Kardon.

In 1999, Harman Kardon and Mercedes-Benz began cooperation. In 2002, the first Harman Kardon surround sound car audio system was introduced into the Mercedes-Benz E-Class sedan.

In 2008, Harman Kardon high-end audio was installed in the new generation SL, marking that all Mercedes-Benz models can have Harman Kardon's groundbreaking in-car audio system.