Applicable models and years

Common Mercedes-Benz models with MOST25 (approx. years)

Model	Chassis Code	Production Years (MOST25)

C-Class

W203, W204 (early)

2004–2010

E-Class

W211, early W212

2003–2010

S-Class

W220 (facelift), W221 (early)

2003–2012

CL-Class

C215 (late), C216 (early)

2003–2012

CLS-Class

W219

2004–2010

SL-Class

R230 (facelift)

2004–2011

SLK-Class

R171

2004–2011

ML/GL-Class

W164, X164

2005–2012

GLK-Class

X204 (early)

2009–2012

R-Class

W251

2006–2012

G-Class

W463 (with COMAND APS)

2003–2012

How to confirm if a car has MOST25

Look behind the head unit or at the back of the CD/DVD changer — you’ll see an orange plastic fiber optic cable with a dual plug.

Check if the car’s audio system menu shows Logic 7 surround — often a sign of MOST25.

Match the infotainment generation (NTG2/2.5/early NTG4) with the model year.

For Mercedes-Benz models with MOST25 MOST150 Fiber Optic Output Port (Please confirm Burmester or Harman Kardon audio version)

Model	Years (MOST150)	Audio System

A-Class (W176)

2015–2018

Harman/Kardon optional

B-Class (W246)

2014–2018

Premium audio options

C-Class (W205)

2014–2021

Premium systems

CLA (C117)

2015–2019

Optional high-end audio

CLS (W218)

2014–2018

Burmester/HK in higher trims

E-Class (W212/W213,Coupes)

2014–2020

Often Burmester or Harman/Kardon

G-Class (W463)

2016+

High-end audio variants

GL/GLA/GLC/GLE

2014–2020

Optional premium systems

SLC/SL/CL/S-Class

2014–2021

Especially in Burmester option trims

Vito/V-Class

2014–2020

Premium sound packages available

Models and Years Featuring eMOST with Coaxial Output

Generally in Burmester-equipped models from 2020+

In-car Audio Retrofit:

The Core Role of the Sound Source

In the field of in-car audio upgrades, the quality of the sound source is the most critical foundation for achieving high-fidelity performance. Due to the varying trim levels—high, medium, and low—of luxury vehicles, some factory-installed head units in mid- to low-tier configurations fail to meet the stringent requirements of audiophiles. These systems often output high-level audio signals that have already undergone factory tuning and internal amplification, resulting in compromised sound quality.

The audio interface box addresses this issue by isolating the audio data commands from the factory head unit—such as volume control, EQ settings, and other sound effects—and bypassing the built-in OEM amplifier. It converts vehicle-specific network audio signals into standardized optical or coaxial digital outputs that are compatible with professional-grade audio equipment.

By doing so, it restores access to a clean, unprocessed sound source and enables integration with high-performance aftermarket amplifiers equipped with digital DSP functionality. This seamless conversion ensures that audiophiles can enjoy a truly refined listening experience, with significantly enhanced soundstage, clarity, and depth—ultimately achieving a professional-level audio upgrade in their vehicle.

Weight	1 kg
System	For Mercedes-Benz Emost With Coaxial Output, For Mercedes-Benz MOST150 With Burmester Or Harman Kardon, For Mercedes-Benz MOST25