SL/R230: Command system replacement
Thread Starter
Member
Joined: Jan 2015
Posts: 77
Likes: 24
2021 GLE450
Command system replacement
I am considering upgrading my car's stereo with a new Multimedia Receiver (Pioneer DMH-W4660NEX). I plan to keep the Bose amp and speakers and just use a MOST connection from the head unit to the amp. The question I have for folks is this. How does the volume control work? Do you preset the volume with the steering wheel control (max volume) and then use the volume controls of the head unit to adjust the volume within the set limit or do the head unit and steering wheel controls both adjust the Bose amp?
Super Member
Joined: Sep 2021
Posts: 541
Likes: 117
From: Ann Arbor, MI
2004 SL600
Your selected Pioneer Head-unit looks top quality. I bought a $180 Head-unit from Amazon and am very happy with it. With an adapter (as mentioned on the Pioneer description), my steering wheel "+" and "-" keys adjust the volume. My head-unit also has a volume control button so that I can quickly change volume if needed. See my post #19 here:
https://mbworld.org/forums/sl55-amg-...004-sl600.html
https://mbworld.org/forums/sl55-amg-...004-sl600.html
Senior Member
Joined: Nov 2021
Posts: 473
Likes: 120
From: North West England
SL500
Your new headunit will control the volume.
The output from the Phono connectors on your head unit will be translated by the MOST converter and the BOSE amp will respond correctly.
Your steering wheel controls will do absolutely nothing.....
UNLESS.....
you use a CANBUS adapter which can connect your headunit to the Mercedes CANBUS. Then the volume controls, forward/Back and telephone buttons on steering wheel will control the new headunit.
Waiting for adapter fascia so I can fit my Pioneer head unit, that I removed from my old SLK, into my 2005 SL500. Hoping the SLK parts will fit the SL500 system
The output from the Phono connectors on your head unit will be translated by the MOST converter and the BOSE amp will respond correctly.
Your steering wheel controls will do absolutely nothing.....
UNLESS.....
you use a CANBUS adapter which can connect your headunit to the Mercedes CANBUS. Then the volume controls, forward/Back and telephone buttons on steering wheel will control the new headunit.
Waiting for adapter fascia so I can fit my Pioneer head unit, that I removed from my old SLK, into my 2005 SL500. Hoping the SLK parts will fit the SL500 system
Last edited by g0rsq; Dec 20, 2021 at 04:11 PM.
Super Member
Joined: Sep 2021
Posts: 541
Likes: 117
From: Ann Arbor, MI
2004 SL600
This is the CANbus adapter I used and which seems to be very popular:
I only got the Volume Up/Down buttons working, but I think that was a limitation of my cheap Head-unit.
I only got the Volume Up/Down buttons working, but I think that was a limitation of my cheap Head-unit.
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