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Car Forum / BMW Cars / October 2006

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Front  "fog" lights

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Tom - 21 Oct 2006 18:25 GMT
OK, My gran had a BMW which whenever it went into the dealer (Farnboro'
Hampshire)  we found the front fog lights switched On

Why?
John Carrier - 21 Oct 2006 18:58 GMT
> OK, My gran had a BMW which whenever it went into the dealer (Farnboro'
> Hampshire)  we found the front fog lights switched On

The service bay was dark?

R / John
Jeff Strickland - 21 Oct 2006 19:05 GMT
Because somebody hit the button.

> OK, My gran had a BMW which whenever it went into the dealer (Farnboro'
> Hampshire)  we found the front fog lights switched On
>
> Why?
Tom - 22 Oct 2006 12:59 GMT
> Because somebody hit the button.

Probably an element of truth there :-)

However as she does not have a handbook**** I would be interested if BMW
believe that front fogs are essential for BMW driving

*** Most handbooks call them driving lights or additional lights and warn on
their legal use - wondered if BMW states something similar
Dave Plowman (News) - 22 Oct 2006 14:21 GMT
> However as she does not have a handbook**** I would be interested if BMW
> believe that front fogs are essential for BMW driving

> *** Most handbooks call them driving lights or additional lights and
> warn on their legal use - wondered if BMW states something similar

In the UK, fog lamps are just that - only to be used in conditions of poor
visibility, other than just darkness. Hence their low mounted position.
Driving or additional lamps are to supplement the main beam.

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Richard Sexton - 23 Oct 2006 06:19 GMT
>> However as she does not have a handbook**** I would be interested if BMW
>> believe that front fogs are essential for BMW driving
[quoted text clipped - 5 lines]
>visibility, other than just darkness. Hence their low mounted position.
>Driving or additional lamps are to supplement the main beam.

The difference is the beam pattern.

Dricig lights throw a concentrated beam stright down the road.

Fog lights throw a short but very wide beam.

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Steve Robinson - 23 Oct 2006 21:40 GMT
> In the UK, fog lamps are just that - only to be used in conditions of poor
> visibility, other than just darkness.

Don't you hate drivers who don't know how to switch them off and drive ona
clear night with rear fog lights blazing...?

...and don't get me started on drivers who don't know how to engage the
handbrake at traffic lights and just hold the footbrake shining their high
level LED brake lights into my eyes!

Steve.
joe_tide - 23 Oct 2006 23:43 GMT
>> However as she does not have a handbook**** I would be interested if BMW
>> believe that front fogs are essential for BMW driving
[quoted text clipped - 5 lines]
> visibility, other than just darkness. Hence their low mounted position.
> Driving or additional lamps are to supplement the main beam.

I was hoping someone else would ask, but nobody has.

What is the purpose of fog lights in the rear? I assume it is just for
visibility.
Dave Plowman (News) - 24 Oct 2006 00:26 GMT
> I was hoping someone else would ask, but nobody has.

> What is the purpose of fog lights in the rear? I assume it is just for
> visibility.

Yes - and not only in fog. Very heavy daylight rain and heavy snow too.

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adder1969@yahoo.co.uk - 24 Oct 2006 10:01 GMT
> > I was hoping someone else would ask, but nobody has.
>
> > What is the purpose of fog lights in the rear? I assume it is just for
> > visibility.
>
> Yes - and not only in fog. Very heavy daylight rain and heavy snow too.

In the UK, it's something like you should only use them if visibility
is less than 100 metres.  Generally if I find it difficult to see the
car in front of me then I'll switch on my rear fogs *unless* the car
behind is close enough that I'm sure he/she can see me anyway.
Dave Plowman (News) - 24 Oct 2006 12:57 GMT
> > Yes - and not only in fog. Very heavy daylight rain and heavy snow too.

> In the UK, it's something like you should only use them if visibility
> is less than 100 metres.  Generally if I find it difficult to see the
> car in front of me then I'll switch on my rear fogs *unless* the car
> behind is close enough that I'm sure he/she can see me anyway.

The purpose is to be seen. If you've established difficulty in seeing a
car ahead because of the poor conditions and it isn't using rear guard fog
lights, you should switch yours on - regardless of who or what is behind
you, as that is beyond your control. If in such conditions they dazzle the
driver behind, he's driving too close and should drop back - indeed in
poor weather many drive too close simply to keep 'in contact' with the
vehicle in front.

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joe_tide - 24 Oct 2006 19:14 GMT
>> > Yes - and not only in fog. Very heavy daylight rain and heavy snow too.
>
[quoted text clipped - 10 lines]
> poor weather many drive too close simply to keep 'in contact' with the
> vehicle in front.

Trying to get educated since I never heard of rear fog lights until now:

What color are the fog lights front & rear? The ones here in the U.S. are
only on the front and they are white (clear).

I am assuming the rears are not white since that may indicate someone is
coming right at you (headlights).
Floyd Rogers - 24 Oct 2006 20:05 GMT
> "Dave Plowman (News)" <dave@davenoise.co.uk> wrote
>> The purpose is to be seen. If you've established difficulty in seeing a
[quoted text clipped - 11 lines]
> What color are the fog lights front & rear? The ones here in the U.S. are
> only on the front and they are white (clear).

They are a very bright red color.  Most Porsches have them.
They are 2-3 times brighter than brake lights (which are about
twice as bright as taillights).  Daniel Stern has particulars, I think
on his website.

FloydR
Dave Plowman (News) - 24 Oct 2006 23:54 GMT
> They are a very bright red color.  Most Porsches have them.
> They are 2-3 times brighter than brake lights (which are about
> twice as bright as taillights).  Daniel Stern has particulars, I think
> on his website.

In the UK, the actual bulbs are the same power as the brake lights. But of
course the design of the reflectors may give the impression they are
brighter. Some cars are only fitted with one - on the driver's side. They
are a safety aid when used as intended - in very poor visibility - but are
often abused and annoy following drivers.

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joe_tide - 25 Oct 2006 01:03 GMT
>> They are a very bright red color.  Most Porsches have them.
>> They are 2-3 times brighter than brake lights (which are about
[quoted text clipped - 6 lines]
> are a safety aid when used as intended - in very poor visibility - but are
> often abused and annoy following drivers.

Thanks. That's very interesting and makes a lot of sense.
Dave Plowman (News) - 22 Oct 2006 14:22 GMT
> OK, My gran had a BMW which whenever it went into the dealer (Farnboro'
> Hampshire)  we found the front fog lights switched On

> Why?

Perhaps to 'prove' they'd been checked as part of the service? Same way as
they leave a sticker on the spare wheel?

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Spack - 23 Oct 2006 09:52 GMT
Tom wrote  on Sat, 21 Oct 2006 17:25:49 GMT:

> OK, My gran had a BMW which whenever it went into the dealer (Farnboro'
> Hampshire)  we found the front fog lights switched On
>
> Why?

Whenever my 320 has an MOT it always ends up with both foglight buttons
depressed when I pick it up. They probably just tested the lights and didn't
switch them back off again.

Dan
Tom - 23 Oct 2006 14:07 GMT
> Tom wrote  on Sat, 21 Oct 2006 17:25:49 GMT:
>
> > OK, My gran had a BMW which whenever it went into the dealer (Farnboro'
> > Hampshire)  we found the front fog lights switched On
> >
> > Why?

I was possibly being ever so slightly paranoid / facetious  (not sure which
/ bit of both maybe :-) -  I think they are only allowed in fog and the
headlights must be  on, fogs only operate effectively with the dipped
headlights off so its silly innit?
adder1969@yahoo.co.uk - 23 Oct 2006 14:12 GMT
> > Tom wrote  on Sat, 21 Oct 2006 17:25:49 GMT:
> >
[quoted text clipped - 7 lines]
> headlights must be  on, fogs only operate effectively with the dipped
> headlights off so its silly innit?

I've only ever found fog lights to be of any use when visibility is
down to inches.  I probably haven't used fronts for 15 years and I use
the rears maybe once every couple of years.
Dave Plowman (News) - 23 Oct 2006 15:03 GMT
> > Tom wrote  on Sat, 21 Oct 2006 17:25:49 GMT:
> >
[quoted text clipped - 7 lines]
> and the headlights must be  on, fogs only operate effectively with the
> dipped headlights off so its silly innit?

All the BMWs I've owned allow the fogs to be used without headlights - as
you say they'd be pointless otherwise. Other countries may have different
regs, though.

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Dodgy - 24 Oct 2006 15:20 GMT
>Tom wrote  on Sat, 21 Oct 2006 17:25:49 GMT:
>
[quoted text clipped - 8 lines]
>
>Dan

Don't worry, you'll blend in perfectly with most of the people on the
M25 for at least 2 weeks following a slight bit of mist!

Dodgy.
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Spack - 24 Oct 2006 15:33 GMT
Dodgy wrote  on Tue, 24 Oct 2006 15:20:47 +0100:

>> Tom wrote  on Sat, 21 Oct 2006 17:25:49 GMT:
>>
[quoted text clipped - 11 lines]
> Don't worry, you'll blend in perfectly with most of the people on the
> M25 for at least 2 weeks following a slight bit of mist!

I never said I didn't turn them off when I pick the car up. So far I think
I've had my rear fogs on once in very heavy mist, and haven't had need of
the fronts. :)

And you won't catch me on the M25 if I can ever help it - it's bad enough
having to use the M42 which is right near where I live, with the Active
Traffic Management system trial, and the M6 Toll which so far I've managed
to avoid using.

Dan
Leroy - 24 Oct 2006 20:07 GMT
To check the beam settings.  I would expect them to turn them off again, but
at least it shows that they are actually checking them.

> OK, My gran had a BMW which whenever it went into the dealer (Farnboro'
> Hampshire)  we found the front fog lights switched On
>
> Why?
 
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