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  #46  
Old 05-29-2004, 02:10 PM
mbzr4ever's Avatar
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Join Date: Apr 2004
Posts: 612
Thanks for the quick reply....

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????
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1991 300E 124.030 103.983KE 722358 03 412178
207K

1979 240D 123.123 250K (Project car)

2000 Ford Ranger, 187K

2015 Dodge Ram 1500 EcoDiesel 37K
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  #47  
Old 05-29-2004, 03:13 PM
sixto's Avatar
smoke gets in your eyes
 
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Location: SF Bay Area
Posts: 20,658
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

Last edited by sixto; 05-29-2004 at 03:18 PM.
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  #48  
Old 05-29-2004, 03:51 PM
mbzr4ever's Avatar
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Join Date: Apr 2004
Posts: 612
So much for the "simple" upgrade...

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...

__________________
1991 300E 124.030 103.983KE 722358 03 412178
207K

1979 240D 123.123 250K (Project car)

2000 Ford Ranger, 187K

2015 Dodge Ram 1500 EcoDiesel 37K
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  #49  
Old 06-15-2004, 04:46 PM
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Join Date: Jul 2002
Location: KINGSPORT, TN
Posts: 197
radio replacement

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.
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  #50  
Old 06-16-2004, 07:44 PM
mbzr4ever's Avatar
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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????
__________________
1991 300E 124.030 103.983KE 722358 03 412178
207K

1979 240D 123.123 250K (Project car)

2000 Ford Ranger, 187K

2015 Dodge Ram 1500 EcoDiesel 37K
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  #51  
Old 06-20-2004, 01:32 AM
Ibe300D
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Quote:
Originally posted by mbzr4ever
I'm thinking...do I really want to tear the car apart again????
yes.
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  #52  
Old 06-26-2004, 11:54 PM
mbzr4ever's Avatar
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Join Date: Apr 2004
Posts: 612
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!!!


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1991 300E 124.030 103.983KE 722358 03 412178
207K

1979 240D 123.123 250K (Project car)

2000 Ford Ranger, 187K

2015 Dodge Ram 1500 EcoDiesel 37K
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