How do I wire this all together? - Page 4 - PeachParts Mercedes-Benz Forum

mbzr4ever · #46 05-29-2004, 01:10 PM

Quote:

Originally posted by sixto
If you have the typical 80s MB with a fader control behind the shifter then you should have 4 speaker wires in the stereo cavity which lead to the fader control and 6 speaker wires downstream of the fader control.

You have the choice of using 4 wires from the replacement stereo to provide a signal to the existing fader control, or bypassing the existing fader control and running new wires to the speakers. You can shortcut new wires all the way through by bridging the front left and and rear left (-) wires and front right and rear right (-) wires leaving you with 6 wires to connect downstream of the existing fader. MAKE SURE YOUR REPLACEMENT STEREO WILL NOT BE DAMAGED BY WIRING IT THIS WAY!

I see from your sig line that you have a 240D and 300E. This should work for the 240D but the wire colors I provided early in this thread are for most 80s MBs. I don't know if your 300E has the later Becker 1432 or similar stereo that has external amplifiers. If so, you need a completely different wiring strategy.

Sixto
95 S420
87 300SDL

This "little project" is for the 91 300E, replacing a Becker 1480 receiver. So I need a completely different wiring strategy????

sixto · #47 05-29-2004, 02:13 PM

AFAIK the Becker 1480 is the kind of stereo that has separate amps. I'm not sure if it has a separate tuner. If it has a separate tuner, there will not be an antenna cable in the stereo cavity. If there is an antenna cable in the stereo cavity, there is no separate tuner. And lucky for you. I don't know where the amps are on a 300E (behind the back seat? in the trunk?). Find them and run speaker wires from the stereo to the amps then tap the wires into the amp harness. Leave the amps disconnected. Or run separate wires to the speakers.

I believe there's a left channel amp and a right channel amp. The connectors for each amp should have numeric markings. I'm fairly sure pin 7 if front (+), pin 8 is front (-), pin 1 is rear (+), pin 3 is rear (-). I said fairly sure

Sixto
95 S420
87 300SDL

mbzr4ever · #48 05-29-2004, 02:51 PM

Quote:

Originally posted by sixto
AFAIK the Becker 1480 is the kind of stereo that has separate amps. I'm not sure if it has a separate tuner. If it has a separate tuner, there will not be an antenna cable in the stereo cavity. If there is an antenna cable in the stereo cavity, there is no separate tuner. And lucky for you. I don't know where the amps are on a 300E (behind the back seat? in the trunk?). Find them and run speaker wires from the stereo to the amps then tap the wires into the amp harness. Leave the amps disconnected. Or run separate wires to the speakers.

I believe there's a left channel amp and a right channel amp. The connectors for each amp should have numeric markings. I'm fairly sure pin 7 if front (+), pin 8 is front (-), pin 1 is rear (+), pin 3 is rear (-). I said fairly sure

Sixto
95 S420
87 300SDL

There is an antenna cable, so it looks like there is no separate tuner.

Ok, time to look for the amps - good thing nothing else going on this holiday weekend...

Thanks, Sixto, for your input...could not have gotten this far without this forum...

SCOTTFISH · #49 06-15-2004, 03:46 PM

I will give you my thoughts and maybe you can use some of the information to help you in case you have not already completed your installation. I have a w126, 300se & 420sel, and I totally rewired my stereo. I used the grounds behind the radio and connected them (2 I think) with the ground from the aftermarket. I used a plug from Crutchfield.com that plugged right into the factory wiring and I wired the appropriate speaker wires, power, antenna, etc. together. I agree to bypass the factory amps as in the w126's, you tend to pick up a whine sometimes if you don't. In unplugging the amps, behind the rear seat, this automatically bypasses the fader on the console behind the shifter. This puts all the balance/fader at the deck. I tapped into the speaker wires at the unplugged amps and used a AA battery to test which wires went to which speakers. I ran all new wires (bought 14 gauge from Walmart) from the rear speakers to the front and the system sounds great now. If you happen to need anything and I can help, just yell.

mbzr4ever · #50 06-16-2004, 06:44 PM

scottfish,

thanks for the info, but the job is done, at least for now...

working on detailing the 240 at the moment, and the next project is putting some window film on both the 240 and the 300....

but just got a good deal on a sub and amp, and I'm thinking...do I really want to tear the car apart again????

#51 06-20-2004, 12:32 AM

Quote:

Originally posted by mbzr4ever
I'm thinking...do I really want to tear the car apart again????

yes.

mbzr4ever · #52 06-26-2004, 10:54 PM

yeah, have to agree with you

but, all plans are on hold (temporarily) while my husband is using the 240D almost daily, as his jeep is having one problem after another - the latest problem, a suspected blown head gasket.

I could go on and on about the jeep, but then...
I would just be preaching to the choir, LOL!!!