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Car Forum / Mercedes-Benz Cars / October 2007

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Rear Window Defogger

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randallbrink@mac.com - 05 Oct 2007 16:37 GMT
The rear window defogger on my '79 300D has stopped working. Before I
start replacing components, what are the most common causes of these
failing, and where best to start?

Thanks in advance...
Karl - 05 Oct 2007 18:13 GMT
The 99.9% failure is the strip fuse in the fuse holder by the top of the drivers front shock.....

> The rear window defogger on my '79 300D has stopped working. Before I
> start replacing components, what are the most common causes of these
> failing, and where best to start?
>
> Thanks in advance...
randallbrink@mac.com - 07 Oct 2007 16:53 GMT
> The 99.9% failure is the strip fuse in the fuse holder by the top of the drivers front shock.....
>
[quoted text clipped - 7 lines]
>
> > Thanks in advance...

Thank you very much. This sounds like a quick fix for a change, and I
appreciate the help.
randallbrink@mac.com - 08 Oct 2007 00:59 GMT
On Oct 7, 8:53 am, "randallbr...@mac.com" <randallbr...@gmail.com>
wrote:

> > The 99.9% failure is the strip fuse in the fuse holder by the top of the drivers front shock.....
>
[quoted text clipped - 10 lines]
> Thank you very much. This sounds like a quick fix for a change, and I
> appreciate the help.

Is that a glass fuse inside the square box on top of the wheel well,
or is it a fuse inside the fusebox on the firewall aft of the
wheelwell?
Karl - 08 Oct 2007 03:16 GMT
It should be a 30 amp strip fuse in the holder. Here is what a strip fuse looks like:
http://www.flickr.com/photos/aufevervw/1510376195/

> On Oct 7, 8:53 am, "randallbr...@mac.com" <randallbr...@gmail.com>
> wrote:
[quoted text clipped - 17 lines]
> or is it a fuse inside the fusebox on the firewall aft of the
> wheelwell?
randallbrink@mac.com - 08 Oct 2007 03:55 GMT
> It should be a 30 amp strip fuse in the holder. Here is what a strip fuse looks like:http://www.flickr.com/photos/aufevervw/1510376195/
>
[quoted text clipped - 24 lines]
> > or is it a fuse inside the fusebox on the firewall aft of the
> > wheelwell?

Hmm. Well, I didn't see anything in the fusebox that looked like that,
but then again, I didn't know what I was looking for. I only saw the
typical colored white and red fuses. I will analyze this again in the
morning. Thank you--this is most helpful, as I would never have know
what to look for otherwise.
Karl - 08 Oct 2007 05:15 GMT
Read what I wrote:

The 99.9% failure is the strip fuse in the fuse holder by the top of the drivers front shock.....

> > It should be a 30 amp strip fuse in the holder. Here is what a strip fuse looks like:http://www.flickr.com/photos/aufevervw/1510376195/
> >
[quoted text clipped - 30 lines]
> morning. Thank you--this is most helpful, as I would never have know
> what to look for otherwise.
randallbrink@mac.com - 14 Oct 2007 19:33 GMT
> Read what I wrote:
>
[quoted text clipped - 39 lines]
> > morning. Thank you--this is most helpful, as I would never have know
> > what to look for otherwise.

I checked again, and the only thing near the top of the wheel well,
driver's side, is a square plastic box, with two large relays inside,
and a plastic in-line fuseholder with a very small red and while glass
fuse inside. No strip fuse(s). Also, there are no strip fuses in the
fuse box on the driver's-side firewall. I am at a loss as to where
this 80A strip fuse is located on my car.
Karl - 14 Oct 2007 23:43 GMT
79 123 body should be fuse #10 in the main fuse box.  :)

> > Read what I wrote:
> >
[quoted text clipped - 46 lines]
> fuse box on the driver's-side firewall. I am at a loss as to where
> this 80A strip fuse is located on my car.
 
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