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

Reply
 
LinkBack Thread Tools Display Modes
  #1  
Old 09-23-2012, 03:42 PM
Registered User
 
Join Date: Jan 2006
Posts: 292
Question 92 S500 radio making weird noises. IE, loud high pitched tone/crackle

My 92 S500's radio started making a loud high pitched tone and/or crackle.
If I turn off radio then turn back on it will work fine for another 10-15min or 10-15 sec. Has anyone had this happen to them? Dont know where to start.
Thanks. Jay

PS. I'm in Canada and we started using the S500 tag in 1992.
Dont want anyone to think I have the year or model posted wrong.

__________________
83 300TD Sable 402K " Work Truck "
81 300SD Gray 240K " Loner Car "
04 E320 Blue 90K " My Winter rig "
07 BMW X5 4.4 118K " My Summer rig"
04 Jetta TDI Wagon 168K " Wifes "
08 Toyota FJ 109K " Wifes winter rig "
04 Jetta TDI 120K " Daughters Car "
Reply With Quote
  #2  
Old 09-23-2012, 06:40 PM
Pili380SL's Avatar
Parts Geek
 
Join Date: Jan 2004
Location: Springfield, MO
Posts: 238
My wife's '95 C car had the exact symptoms, and it was the amp in the trunk going bad. Try to isolate it to one speaker, I think that would prove it.
__________________
1983 380SL
1995 C280
1995 S500 coupe
1990 Mazda Miata
2004 Suzuki Hayabusa
Reply With Quote
  #3  
Old 09-23-2012, 06:55 PM
Registered User
 
Join Date: Jan 2006
Posts: 292
Its the front drivers side dash speaker. How do I test amp?
Thanks. Jay
__________________
83 300TD Sable 402K " Work Truck "
81 300SD Gray 240K " Loner Car "
04 E320 Blue 90K " My Winter rig "
07 BMW X5 4.4 118K " My Summer rig"
04 Jetta TDI Wagon 168K " Wifes "
08 Toyota FJ 109K " Wifes winter rig "
04 Jetta TDI 120K " Daughters Car "
Reply With Quote
  #4  
Old 09-23-2012, 07:17 PM
Pili380SL's Avatar
Parts Geek
 
Join Date: Jan 2004
Location: Springfield, MO
Posts: 238
I don't know the specifics of testing it with a meter, but the fact that one speaker is out points to the amp. If your two piece radio is basically the same as the later one piece, the radio doesn't have an output for each speaker. The amp separates it.
__________________
1983 380SL
1995 C280
1995 S500 coupe
1990 Mazda Miata
2004 Suzuki Hayabusa
Reply With Quote
  #5  
Old 09-23-2012, 07:58 PM
Registered User
 
Join Date: Jan 2006
Posts: 292
Speaker is not always out, only goes out when the high pitch tone and cracking starts.
Thanks.Jay
__________________
83 300TD Sable 402K " Work Truck "
81 300SD Gray 240K " Loner Car "
04 E320 Blue 90K " My Winter rig "
07 BMW X5 4.4 118K " My Summer rig"
04 Jetta TDI Wagon 168K " Wifes "
08 Toyota FJ 109K " Wifes winter rig "
04 Jetta TDI 120K " Daughters Car "
Reply With Quote
  #6  
Old 09-23-2012, 08:50 PM
Pili380SL's Avatar
Parts Geek
 
Join Date: Jan 2004
Location: Springfield, MO
Posts: 238
It's typical for the amp to go out when hot. That's what ours did and sounds like that's the case with yours.
__________________
1983 380SL
1995 C280
1995 S500 coupe
1990 Mazda Miata
2004 Suzuki Hayabusa
Reply With Quote
  #7  
Old 09-23-2012, 11:14 PM
Registered User
 
Join Date: Jan 2006
Posts: 292
Found this site. Going to have my buddy look at it for me. It says the capacitors might be dried up.


Mercedes w140 Bose amplifier rebuild
__________________
83 300TD Sable 402K " Work Truck "
81 300SD Gray 240K " Loner Car "
04 E320 Blue 90K " My Winter rig "
07 BMW X5 4.4 118K " My Summer rig"
04 Jetta TDI Wagon 168K " Wifes "
08 Toyota FJ 109K " Wifes winter rig "
04 Jetta TDI 120K " Daughters Car "
Reply With Quote
  #8  
Old 09-24-2012, 11:15 AM
Registered User
 
Join Date: Jun 2012
Posts: 228
Quote:
Originally Posted by Targa-NF View Post
Found this site. Going to have my buddy look at it for me. It says the capacitors might be dried up.


Mercedes w140 Bose amplifier rebuild
I have a Bose Amp in case you need one.
I can get the part number if interested.
Reply With Quote
  #9  
Old 10-12-2012, 09:50 PM
Registered User
 
Join Date: May 2012
Location: El Dorado Hills, CA, USA
Posts: 418
There are two generations of the amp:

This should answer your questions.

MBCluster.com Mercedes W140 Instrument Cluster Repair Homepage

It is a pain to unsolder each amp module on the old style, but it can be DIY'ed

Here is a DIY:

W140 BOSE AMP Rebuild - Benzworld.org - Mercedes-Benz Discussion Forum

Best of luck,

Martin
Reply With Quote
  #10  
Old 10-14-2012, 08:26 PM
Registered User
 
Join Date: Jan 2006
Posts: 292
The plug looks the same on the later stile amp. Has anyone tried to use a amp from a 95-99 part number 140 820 22 89, with a 92-94 that calls for a amp with part number 140 820 00 89.

__________________
83 300TD Sable 402K " Work Truck "
81 300SD Gray 240K " Loner Car "
04 E320 Blue 90K " My Winter rig "
07 BMW X5 4.4 118K " My Summer rig"
04 Jetta TDI Wagon 168K " Wifes "
08 Toyota FJ 109K " Wifes winter rig "
04 Jetta TDI 120K " Daughters Car "
Reply With Quote
Reply

Bookmarks

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 10:33 AM.


Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2024, vBulletin Solutions, Inc.
Search Engine Optimization by vBSEO 3.6.0
Copyright 2024 Pelican Parts, LLC - Posts may be archived for display on the Peach Parts or Pelican Parts Website -    DMCA Registered Agent Contact Page