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2007 E220CDI, 1990 300E-24V, 1987 W124 3.6 AMG build 1993 E500 W124, 94 320CE, 1997 W140 S280
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Discussion Starter · #1 ·
I have owned my 2003 FL S600V12TT for a couple years now. Did alot of work on it but don't drive it very often. Trying to drive it more now and the following issue is starting to annoy me!

Ever since I owned it the front speakers have been cutting out / intermittent. It was initially not very often that it did it but has deteriorated to where they are party much off all the time now.

I had read the Bose Amp could be water damaged or faulty. So I grabbed one that looked really clean from a junker recently. Installed that tonight:

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And the front speakers were still dead. Doesn't matter what the fader settings are the fronts are dead only the tweeter in the centre dash works when fader turned all way to front.

Then I discovered that if I slapped the front lower drivers door speaker the fronts came back on and stay on. It feels unlikely to me that both rear amps which look clean have anything to do with it. I just find it strange that of there is one bad connection in the drivers door it could take out both front door speakers(?)

I guess I need to gingerly remove the pristine cream leather front drivers door card this weekend and clean / check the speaker wiring.

Any members experienced a fault like this before? Wouldn't be the speaker itself would it? I alsp have a full set of them spare if need be.
 

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It is a likely possibility that the BOSE Amp is shutting down the front Channels to avoid damage to itself when it detects a circuit issue in one of it's speakers ;)

May just be a high resistance connection ;)

HTH :)
 
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Registered
2007 E220CDI, 1990 300E-24V, 1987 W124 3.6 AMG build 1993 E500 W124, 94 320CE, 1997 W140 S280
Joined
1,909 Posts
Discussion Starter · #3 ·
It is a likely possibility that the BOSE Amp is shutting down the front Channels to avoid damage to itself when it detects a circuit issue in one of it's speakers ;)

May just be a high resistance connection ;)

HTH :)
Thanks Dave, yes I was thinking it must be something along those lines! The Bose amps must be smarter than we give them credit for.

I am thinking maybe someone was in there before replacing a window regulator and trapped the cable.

As far as I recall the speaker wires are soldered to the speaker. There is only one speaker plug socket high up in the door.

I'll take the door card off tomorrow evening hopefully to get a first look. Will try to replicate the issue whilst inspecting.
 

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2000 S430, 2003 S430, 2000 S500, 2003 S600 TT, and 2005 E320 CDI
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They are soldered to the speaker, that's true. However, fortunately there's a quick-disconnect on the speaker wiring harness, which is really nice.

My suspicion is that the contacts in that quick-disconnect simply need a little love from a wire brush. When I was doing the Android upgrade in the wife's 2000 S500 and replacing the speakers, I went ahead and did that, too.
 
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Registered
2007 E220CDI, 1990 300E-24V, 1987 W124 3.6 AMG build 1993 E500 W124, 94 320CE, 1997 W140 S280
Joined
1,909 Posts
Discussion Starter · #5 ·
Thanks for that - I believe I have it fixed! I woke up at 5am this morning and just went on out and got it back together and going nicely

I will post more details later with photos
 

Registered
2007 E220CDI, 1990 300E-24V, 1987 W124 3.6 AMG build 1993 E500 W124, 94 320CE, 1997 W140 S280
Joined
1,909 Posts
Discussion Starter · #6 ·
OK I took into this early and double checked my diagnosis first. Turned on stereo and both front speakers were dead. Slapped the drivers lower speaker and again they came back on.

I removed the drivers door card very carefully. No one had ever been there before I know that much and I did not break a single fixture :)

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As can be seen I was mistaken about the wires being soldered to the speaker. Whilst the cable vanishes inside the speaker body when you split it apart there are spade connectors.

The wiring was all 100% passing visual and wiggle tests. So I decided to use the spare matching Bose speaker assembly I had on the shelf instead. And before fitting took it apart to clean the connectors for good measure.

Put the door card back on, no fasteners left over that is good!

And took it for a drive. The whole time (first time in my ownership really) the Bose system was on full power and working flawless. Tested with Metalica :giggle: So all good this one was a lucky find on the old speaker slap technique but saved digging further at Amp which was the wrong place to look.
 

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2000 S430, 2003 S430, 2000 S500, 2003 S600 TT, and 2005 E320 CDI
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Ah, forgot about the spade connectors. After you mentioned it and posted the pic, I remembered when I did the speaker replacement. Yep, it's there.

Folks, we've been shown yet again how important it is to clean those connectors. Dave's previous advice in other threads about protectant grease on the connectors is sounding better and better....
 
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W220 Moderator
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When I upgraded the speakers on my 2 R170's and my W220, I cut those terminals off and soldered the wires to the new Speakers ;) Nice factory wiring that way, plug and play ;)
 
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