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 > Diesel Discussion

Reply
 
LinkBack Thread Tools Display Modes
  #1  
Old 11-09-2013, 12:04 PM
Registered User
 
Join Date: Jul 2004
Location: Barrington, RI
Posts: 5,643
Electrical Interference Using iPhone

I'm quite satisfied with the stock audio system on my 98 E300D. My only problem is electrical interference. To listen to music, I use a cassette adapter with either an iPod Touch or an iPhone 5s. I have not noted any interference when using the iPod (set to airplane mode so there are no radio signals). However, I frequently hear various electrical interference noises when using the iPhone. So far, I have not been able to detect any rhyme or reason as to the conditions that cause the interference (proximity, orientation, etc....). I should say that, when using the iPhone, I'm using the network (i.e. an internet radio station or accessing my music from the cloud).

Any ideas as to how to minimize or eliminate such interference? Thanks.

__________________
06 E320 CDI "Benson", Platinum Blue, 180k mi, Stage 1 tune
06 E320 CDI "Rutherford", Black, 151k mi, Stage 1 tune
91 300D "Otis", Smoke Silver, 132k mi

19 Honda CR-V EX 10k mi
Thirteen other MB's owned and sold
1961 Very Tolerant Wife
Reply With Quote
  #2  
Old 11-10-2013, 12:03 AM
vstech's Avatar
DD MOD, HVAC,MCP,Mac,GMAC
 
Join Date: Mar 2006
Location: Mount Holly, NC
Posts: 26,389
same charger?
often 12v chargers have interference with speakers that pickup the alternator sync... and broadcast it into the speakers...
__________________
John HAUL AWAY, OR CRUSHED CARS!!! HELP ME keep the cars out of the crusher! A/C Thread
"as I ride with my a/c on... I have fond memories of sweaty oily saturdays and spewing R12 into the air. THANKS for all you do!

My drivers:
1987 190D 2.5Turbo
1987 190D 2.5Turbo
1987 190D 2.5-5SPEED!!!

1987 300TD
1987 300TD
1994GMC 2500 6.5Turbo truck... I had to put the ladder somewhere!
Reply With Quote
  #3  
Old 11-10-2013, 09:16 AM
thayer's Avatar
Mercerator
 
Join Date: Oct 2008
Location: Mt. Airy, NC
Posts: 891
yes, cig lighter does that in my suburban. I like the stock system too. \\BlitzSafe MB/AUX DMX V.1B EnfigCarStereo.com

iPod iPhone Aux Input Mercedes Benz Audi VW Becker Porsche Jaguar Peugeot Smart | eBay

This should solve the problem. Either that or change the ground to your stereo and cig lighter to somewhere else with beefier wire.
__________________

77' 300D, "Cartman" SOLD @ 150K (didn't know what I had)
83' 300SD, "The Superdon" 325k+ @ 28mpg
95 E320 wagon, "Millennium Falcon" 231k+ @ 24 Mpg
95 E300D, "Sherley" 308k @ 33.69 Mpg, currently anticipating a head
99 Suzuki Intruder "Trudy" @ 45 mpg
Reply With Quote
  #4  
Old 11-10-2013, 02:03 PM
jay_bob's Avatar
Control Freak
 
Join Date: Oct 2011
Location: Columbia, SC
Posts: 3,685
Is the noise present only when you are trying to charge with a lighter adapter and listen at the same time?

Is the noise engine speed dependent (i.e. does it do it when you are driving or even if the car is turned to pos I with the engine stopped)?

Or is it a constant raspy buzz that happens whenever you are on the phone, get a text, or using data to stream music? If so who is your cell carrier?
__________________
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
  #5  
Old 11-10-2013, 08:04 PM
Registered User
 
Join Date: Jul 2004
Location: Barrington, RI
Posts: 5,643
I have not been using the charger when I've noticed the noise....so the charger is not part of the equation.

No, nothing related to engine speed.

It's only when listening to music....I'd describe it as heavy static.

I wonder if somehow shielding the cable on the cassette adapter would help.

Quote:
Originally Posted by jay_bob View Post
Is the noise present only when you are trying to charge with a lighter adapter and listen at the same time?

Is the noise engine speed dependent (i.e. does it do it when you are driving or even if the car is turned to pos I with the engine stopped)?

Or is it a constant raspy buzz that happens whenever you are on the phone, get a text, or using data to stream music? If so who is your cell carrier?
__________________
06 E320 CDI "Benson", Platinum Blue, 180k mi, Stage 1 tune
06 E320 CDI "Rutherford", Black, 151k mi, Stage 1 tune
91 300D "Otis", Smoke Silver, 132k mi

19 Honda CR-V EX 10k mi
Thirteen other MB's owned and sold
1961 Very Tolerant Wife
Reply With Quote
  #6  
Old 11-10-2013, 08:32 PM
jay_bob's Avatar
Control Freak
 
Join Date: Oct 2011
Location: Columbia, SC
Posts: 3,685
Are you on AT&T or T-Mobile?

If so the way these phones communicate with the tower (GSM) causes a lot of interference. If you place a GSM phone next to anything with an amplifier and speaker you will get a raspy buzz buzz sound.

Verizon uses CDMA which does cause as much interference.
__________________
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
  #7  
Old 11-10-2013, 08:49 PM
Registered User
 
Join Date: Jul 2004
Location: Barrington, RI
Posts: 5,643
AT&T

Quote:
Originally Posted by jay_bob View Post
Are you on AT&T or T-Mobile?

If so the way these phones communicate with the tower (GSM) causes a lot of interference. If you place a GSM phone next to anything with an amplifier and speaker you will get a raspy buzz buzz sound.

Verizon uses CDMA which does cause as much interference.
__________________
06 E320 CDI "Benson", Platinum Blue, 180k mi, Stage 1 tune
06 E320 CDI "Rutherford", Black, 151k mi, Stage 1 tune
91 300D "Otis", Smoke Silver, 132k mi

19 Honda CR-V EX 10k mi
Thirteen other MB's owned and sold
1961 Very Tolerant Wife
Reply With Quote
  #8  
Old 11-10-2013, 09:03 PM
jay_bob's Avatar
Control Freak
 
Join Date: Oct 2011
Location: Columbia, SC
Posts: 3,685
I'm afraid that's probably your problem. Not much you can do about it except maybe using Bluetooth streaming and keeping the phone as far away from the radio as possible.
__________________
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
  #9  
Old 11-10-2013, 09:26 PM
Registered User
 
Join Date: Jul 2004
Location: Barrington, RI
Posts: 5,643
Quote:
Originally Posted by jay_bob View Post
I'm afraid that's probably your problem. Not much you can do about it except maybe using Bluetooth streaming and keeping the phone as far away from the radio as possible.
Do you think using a radio transmission to an FM station would be a viable alternative....or would I still have the same problem?
__________________
06 E320 CDI "Benson", Platinum Blue, 180k mi, Stage 1 tune
06 E320 CDI "Rutherford", Black, 151k mi, Stage 1 tune
91 300D "Otis", Smoke Silver, 132k mi

19 Honda CR-V EX 10k mi
Thirteen other MB's owned and sold
1961 Very Tolerant Wife
Reply With Quote
  #10  
Old 11-10-2013, 10:28 PM
Skid Row Joe's Avatar
PRESIDENT DONALD J. TRUMP
 
Join Date: Oct 2007
Location: #KeepingAmericaGreat!
Posts: 6,936
I've not had any issues with any in-car or truck electricals interference. I use all (3) big carriers too.
__________________

06 E320 CDI - PEWTER/CHARCOAL
C7 Stingray Vert /M7-speed manual trans/3LT/MSRC/FE2/Z51 - Arctic White / Jet Black Napa interior
Reply With Quote
  #11  
Old 11-10-2013, 10:56 PM
funola's Avatar
Registered User
 
Join Date: May 2005
Location: NYC
Posts: 8,243
I would suggest buying a Bluetooth radio so you can wirelessly stream music and have hands-free speakerphone and never worry about getting a ticket talking while driving. I have 2 Pioneer DEH 6500BT's and love it so much I'm buying a 3rd one.
__________________
85 300D turbo pristine w 157k when purchased 161K now
83 300 D turbo 297K runs great. SOLD!
83 240D 4 spd manual- parted out then junked
Reply With Quote
  #12  
Old 11-10-2013, 11:18 PM
funola's Avatar
Registered User
 
Join Date: May 2005
Location: NYC
Posts: 8,243
Quote:
Originally Posted by Skid Row Joe View Post
I've not had any issues with any in-car or truck electricals interference. I use all (3) big carriers too.
Just noticed ur sig. You have to add effect/ affect. Lol
__________________
85 300D turbo pristine w 157k when purchased 161K now
83 300 D turbo 297K runs great. SOLD!
83 240D 4 spd manual- parted out then junked
Reply With Quote
  #13  
Old 11-11-2013, 06:19 AM
jay_bob's Avatar
Control Freak
 
Join Date: Oct 2011
Location: Columbia, SC
Posts: 3,685
As soon as I get a chance I am going to figure out how to hack the CD player interface so that it becomes a line-in. If I get that working then my bluetooth mod in the audio forum might be your best choice.

The way I have mine set up now, it will stream, but only to the two little speakers in the dash. Sounds just like a 1st gen 124 with the fader rolled all the way to the front. Tolerable but no bass.
__________________
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
  #14  
Old 11-11-2013, 12:05 PM
JamesDean's Avatar
Electrical Engineer
 
Join Date: Apr 2005
Location: NE Ohio
Posts: 5,034
David,

Have you tried another tape adapter device? The static you are hearing might be caused by that device.

You should also try another input device to the tape adapter.

That way you can isolate the problem to either your phone or the tape adapter.

An FM or Bluetooth transmitting device might be a viable solution IF you find that the tape adapter is not the problem.
__________________
Cruise Control not working? Send me PM or email (jamesdean59@gmail.com). I might be able to help out.
Check here for compatibility, diagnostics, and availability!

(4/11/2020: Hi Everyone! I am still taking orders and replying to emails/PMs/etc, I appreciate your patience in these crazy times. Stay safe and healthy!)


82 300SD 145k
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
  #15  
Old 11-11-2013, 02:16 PM
jay_bob's Avatar
Control Freak
 
Join Date: Oct 2011
Location: Columbia, SC
Posts: 3,685
I'm on the road for work this week. Drew a Chebby Impala for a rental car this week with the Hertz Never Lost. They have a new version system with a GSM cellular radio in it for live updates. Every time I start the car I get the "bzzt bzzt tat tat bzzzzttt" off the GSM radio into the stereo speakers as the unit syncs up.

If your interference sounds like that I am not sure that even Bluetooth will help you. That crappy GSM modulation is the RF equivalent of throwing a boulder into a swimming pool. The harmonics that come forth from that couple into anything with two wires and a semiconductor junction and a speaker. (Ever built a crystal radio as a kid and notice how it picked up every bit of stray rf and demodulated it, so you got the Tower of Babel in your ear?)

I think that is why the owners manual for the W210 cautions against running any type of transmitter inside the vehicle that was not the MB installed cell phone with the external antenna. It's not coincidence that the built in cell antenna is in the back bumper on the W210, as far away from the powertrain and ABS ECUs as possible, and 90* rotated with respect to the main wiring runs in the car.

__________________
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
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 On
Trackbacks are On
Pingbacks are On
Refbacks are On




All times are GMT -4. The time now is 11:04 AM.


Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2020, 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