No rear lights in heavy rain.

[ash59fifty-uk]

All you have to do is look at your dashboard, if there's one light that is on it is green you have your sidelights on, if there are two lights that are on and they are both green then you have your headlights on.

On mine one green symbol means all lights are on (automatic setting) blue symbol means main beam is on

 

[StuartK]

Auto lights for the brain dead , and this idiotic front only implementation of DRLs are the problem .

When DRLs were first mandated in certain European countries in the 1970s they included tail lights as well as 21W front lights .

Auto lights don't recognise adverse weather in daylight as the ambient light usually remains above their threshold , and heavy rain isn't really what rear fog lamps were designed for ( the earlier legal guideline : ' when visibility is reduced to less than 100m by fog or falling snow ' gave a much better indication of when they were appropriate ) .

It is also a design flaw in a lot of newer cars that the instruments light up all the time , making it less obvious when no lights are on .

People should think about their driving when behind the wheel , and should remember that they are in charge of and driving the car , not the other way round

My auto lights have always worked in rain etc. Only thing they don't do is fog.

 

[StuartK]

People who drive with front fogs on in rain do my head in!

 

[ash59fifty-uk]

People who drive with front fogs on in rain do my head in!

And rear fogs near on blinds me with the sheet of rain on my windscreen magnifying the glow constantly

 

[StuartK]

And rear fogs near on blinds me with the sheet of rain on my windscreen magnifying the glow constantly

Idiots should be fined on the spot.

 

[219]

Volvo and saab had this problem sorted years ago

Mercedes too - it was a requirement in the scandanavian countries , hence fitted to cars sold there .

 

[def90cars]

Where DRLs come in, is that prior to LED technology it would have been difficult to pass an 'always on' legislation in EU due to it being perceived as energy wasteful and not echo-friendly (other than possibly in some Northern European countries where visibility is poor throughout the year). DRLs made it possible to stipulate 'always on'.

I agreed with all you said except this.

All DRLs were non-LED for many years.

My W204 has non-led DRLs.

LED was not the driver for this.

 

[toffee-pie]

DRL : Didn't Realise they are Lights.