Question about Mercedes-Benz C-Class

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Audio off I found no sound out of my radio and a message of "audio off ----" in the board?

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Is there a mute button somewhere on the car?

Posted on Mar 19, 2014

Testimonial: "Have tried to press it on and off but did not do anything!"

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Posted on Jan 02, 2017

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2 Answers

Lost sound on 2005 impala. radio works. seems like amp problem.


Do you have base or up;level system ?

Table 1: Radio Features
Table 2: Cassette Features
Table 3: Compact Disc Features
Table 4: XM Advisory Messages
The radio receives power from the RADIO fuse in the junction block-right I/P. Ground is provided via G201 and G202. The radio is enabled/disabled by class 2 messages from the body control module (BCM). The radio routes audio signals from the digital radio receiver or the vehicle communication interface module (VCIM) to the speakers and/or amplifier when directed by class 2 messages.
The Entertainment System on this vehicle is configured with an AM/FM stereo radio with the radio data system (RDS) and either a cassette player or a CD player or both. CD and cassette. The uplevel system provides the customer with extended range speakers and an audio amplifier. Satellite digital radio (U2K) is available with uplevel systems.
The following list shows the radios available for this vehicle:
• Radio (ULO) - AM/FM Stereo, Cassette with RDS
• Radio (UNO) - AM/FM Stereo, CD and RDS
• Radio (UPO) - AM/FM Stereo, Cassette with CD and RDS .The complexity of the radio systems on these vehicle is mind blowing .

Your best bet take it to a GM dealer , has features you are unawear of .
DTC B1025, B1035, B1045, or B1055
When the radio is powered up, the radio supplies low level audio signals to the speakers. If the vehicle is equipped with an audio amplifier, the amplifier will boost the signal sent to the speakers.
DTC B1025 Audio Output Circuit
Install a scan tool.
Turn ON the ignition, with the engine OFF.
With the scan tool, monitor the DTC Information for DTC B1025.
Does the scan tool indicate that DTC B1025 is current?

Jan 31, 2017 | Cars & Trucks

1 Answer

I have a 2000 oldsmobile alero and I can't get sound out of my rear speakers good speakers and connection just no sound


OLDSMOBILE ALERO 2000 speakers - Sonic Electronix

www.sonicelectronix.com/oldsmobile-alero-2000-car-speakers.html
OLDSMOBILE ALERO 2000 speakers - find speakers that fit your ... sound. This size is capable of delivering exceptional mid-bass that can't be found in smaller ...

2001 Oldsmobile Alero Car Radio Stereo Audio Wiring ...

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Easy Plug and Play Wiring Adapter. ... 2001 Oldsmobile Alero Car Radio Stereo Audio Wiring Diagram ... If you can't find your car audio wire diagram, car stereo wire diagram or car radio ... Right Rear Speaker Positive Wire (+): Dark Blue ... olds alero and I have replace the stock stereo and have found that the sound out put ...

Request a Oldsmobile Car Radio Stereo Wiring Diagram


Jan 21, 2016 | Oldsmobile Cars & Trucks

1 Answer

Dennis my 1995 lincoln towncar JBL radio quit producing sound the system comes on fine but I get no sound could u help me please, what is the problem?


The Amp in the trunk might have blown,
Town Car Radio Wire Diagram
Car Radio Battery Constant 12v+ Wire: Pink/Light Blue
Car Radio Accessory Switched 12v+ Wire: Yellow/Black
Car Radio Ground Wire: Black/Light Green
Car Radio Illumination Wire: Light Blue/Red
Car Stereo Dimmer Wire: Blue/Red
Car Stereo Antenna Trigger Wire: Blue
Car Stereo Amplifier Location: Trunk
Car Audio Front Speakers Size: 5? x 7? Speakersir?t=modilife-20&l=as2&o=1&a=b00009uhre
Car Audio Front Speakers Location: Doors
Left Front Speaker Positive Wire (+): Orange/Light Green
Left Front Speaker Negative Wire (-): Light Blue/White
Right Front Speaker Positive Wire (+): White/Light Green
Right Front Speaker Negative Wire (-): Dark Green/Orange
Car Audio Rear Speakers Size: 6? x 9? Speakers[img src="http://www.assoc-amazon.com/e/ir?t=modilife-20&l=as2&o=1&a=B00009UHRE" width="1" height="1" border="0" alt="">
Car Audio Rear Speakers Location: Rear Deck
Left Rear Speaker Positive Wire (+): Gray/Light Blue
Left Rear Speaker Negative Wire (-): Tan/Yellow
Right Rear Speaker Positive Wire (+): Orange/Red
Right Rear Speaker Negative Wire (-): Brown/Pink
Check the fuses

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Jul 20, 2014 | 1995 Lincoln Town Car

1 Answer

Radio will not recognise cd interchanger on jaguar s type 2001


sounds like a d2b network problem.or a faulty cd unit or audio head unit check powers and grounds to cd unit first, if ok have the fault codes read out of the audio head unit by someone with jag. diagnostic equipment

Nov 08, 2013 | Jaguar Cars & Trucks

2 Answers

WITSON DOUBLE-DIN DVD GPS NO AUDIO


This sounds like a setting found in the OPTIONS or SETTINGS portion of your MENU. As the "Safe Driving" banner implies, the voice has been muted. I use a TOM-TOM system which has voice adjusting capabilities. Most likely someone found the voice annoying and shut it down or someone did not want you to be distracted by the voice feature.

This is a little thing to fix and if you can not reprogram it, a BMW Dealer may do a Courtesy fix to build a Relationship with you.

I hope my solution is helpful.

Aug 05, 2012 | BMW Cars & Trucks

1 Answer

Wire diagram 10335223


Anyway long story short, I was looking at the circuit boards of both radios and found a small 8 pin chip that was a 4Kb EEProm .
I figured this could be where the vin is stored and maybe other vehicle settings that can be changed by through the radio.

I tried to exchange these EEProms between both radios with the rationale that I would bring the vin and settings from one to the other but this did not work.
It results in a 'CAL ERROR' message for ~1-2 secs when the radio is on.
An interest side effect is that Theftlock was completely bypassed :) :) :) :)

So I returned each EEPROM to the radio they belonged to
but left pin 8 of the EEPROM not soldered/connected. (pin eight is power to the EEPROM)

Except for the CAL ERROR message for a 1-2 secs when I turn on the radio, all works perfect.
All sound settings, bass, treble, radio stations, resume place on the cd/mp3 are stored when the vehicle is shutdown too.
All integration/Class II features:
Chimes, OnStar, dimming, off when door open etc work fine too :)

Bottom line, just find the 9355093 8 pin serial EEPROM, take a soldering iron and a very small screwdriver/knife.
Heat pin #8 and lift/pry *very* carefully so it no longer contacts board.

that's it.

Jan 09, 2012 | Chevrolet Cars & Trucks

1 Answer

I have an Odyseey 2004 ex/ex-l model cd/radio player. The battery died a week ago. After replacing, I am getting a "code err 3" message on the screen. Neither the radio or cd player work. Before I go buy...


If an audio unit with theft protection is disconnected from electrical power, you must enter a unique code number into the unit or it will not work. This code and the audio unit’s serial number are listed on the anti-theft ID card that comes with the vehicle. If this card is lost, you must obtain the audio unit serial number in order to get the radio code (some people say that they have found the code on a sticker inside the glove compartment, but I wouldn’t count on that). Some newer vehicles allow you to retrieve the audio unit serial number electronically from the radio. Refer to your owner’s manual for the specific procedure (the following usually will work: Turn the radio off. Push the preset 1, preset 6, and power buttons at the same time, then quickly release.)
Once you have the audio unit serial number, you can call Auto Customer Service at (800) 999-1009 or have the dealer look up the radio code.
Hope this helps you understand the process.

Nov 22, 2009 | 2004 Honda Odyssey

1 Answer

Infiniti G35 speakers don't work


03 and 04 G35 vehicles had a Technical Service Bulletin issued regarding the audio circuit board. No sound was one of the symptoms of a faulty circuit board. There was a design flaw with the boards on the early model G35's that was corrected in 05.The audio units on those cars consisted of three pieces, the radio itself, which is just a silver box, a circuit board that attaches to the front of the radio and then the outer display. I would suggest contacting a dealership service dept. with your VIN number in hand, and ask if the circuit board has been replaced. Even if it has, It will still more than likely be the problem. It's either that or the radio 

Apr 27, 2009 | 2004 Infiniti G35 Sport Coupe

1 Answer

Radio audio muted and cd changer gives message no cd changer c320


Hi, Joe here to help. The cd changer is at fault. You need to replace the changer. The system is on a fiber optic loop which cuts out the sound if can not complete that loop.

Apr 08, 2009 | 2004 Mercedes-Benz C-Class

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