Parts Catalog Accessories Catalog How To Articles Tech Forums
Call Pelican Parts at 888-280-7799
Shopping Cart Cart | Project List | Order Status | Help

Go Back   PeachParts Mercedes-Benz Forum > Mercedes-Benz Tech Information and Support > Car Audio and Multimedia

LinkBack Thread Tools Display Modes
Old 11-19-2014, 02:00 PM
Registered User
Join Date: Sep 2012
Posts: 204
After Market stereo

So I finally decided to install an after market stereo in my 84 300D, PO had removed the stock and install an after market. but the fader wheel on the center counsel was not wire properly. Hence rear speaker did not sound good.

How do I connect all the speaker wires from the after market stereo with four sets of wires to the two sets of wires for the stock stereo with the fader on the counsel functioning.

Right now just to have sound, I have the front speaker wires from the after market stereo connected to the two sets of wires. the rear speaker are getting something but not as good as the front. None of the rear speaker wires from the after market stereo are connected.
1984 300D, 1972 LT1 Corvette, 2014 Artic White 3LT/Z51 C7, 2013 650i Convertible BMW, 1994 Kawasaki Vulcan, 1992 Yamaha Seca II and 1996 Dodge Ram 2500.
Reply With Quote
Old 11-20-2014, 03:32 PM
JamesDean's Avatar
Electrical Engineer
Join Date: Apr 2005
Location: NE Ohio
Posts: 5,021
You will need to connect two of the the outputs from the head unit directly to the fader. The fader should then take those two and output four.

The rear outputs on the head unit are left disconnected.

Typically folks bypass the fader as they go bad, get dirty etc.
Cruise Control not working? Send me PM or email ( I might be able to help out.
Check here for compatibility, diagnostics, and availability!

82 300SD 145k
82 300SD 265k
87 420SEL 230k
89 420SEL 210k
89 560SEL 118k
90 300SE 262k RIP 5/25/2010
90 560SEL 154k
91 300D 2.5 Turbo. 241k
93 190E 3.0 235k
93 300E 195k
Reply With Quote
Old 11-21-2014, 08:34 PM
jay_bob's Avatar
Control Freak
Join Date: Oct 2011
Location: Columbia, SC
Posts: 3,428
Most new stereos have 4 amps. The fader is meant for a 2 amp system.

In an old 123/124/126 with the fader you have to bypass it completely and get all 8 speaker wires isolated and connected to the head unit's outputs.

It's not too hard to follow the wire pack from the radio to the fader to the speakers.
Or just run all new wires.
The OM 642/722.9 powered family
2014 ML350 Bluetec (wife's DD)
2013 E350 Bluetec (my DD)
2008 ML320 CDI (Older sonís DD)
2008 E320 Bluetec (Younger son's DD)

1998 E300DT sold to TimFreeh
1987 300TD sold to vstech
gone but living on
1983 240D (body to greazzer, engine to t walgamuth)
Reply With Quote


Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On

All times are GMT -4. The time now is 04:19 AM.

Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2019, vBulletin Solutions, Inc.
Search Engine Optimization by vBSEO 3.6.0
Copyright 2018 Pelican Parts, LLC - Posts may be archived for display on the Peach Parts or Pelican Parts Website -    DMCA Registered Agent Contact Page