Sensor on back of rear view mirror
- Thread starter t6_tom
- Start date
what does main beam assist do?!
Switch the lights on when in a tunnel or shade?
Switch the lights on when in a tunnel or shade?
I’ve got a sensor on the back of mine (Highline without HBA) and I believe it to be the ambient light sensor for the auto dimming mirror. Can’t remember which side it’s on though.
It compares the ambient light level to the level being shone in through the rear window.
if you cover it and shine a torch at the mirror, it thinks it’s night time and dims.
It compares the ambient light level to the level being shone in through the rear window.
if you cover it and shine a torch at the mirror, it thinks it’s night time and dims.
Thanks. That makes some sense, i thought it was the HBA sensor like @Pauly but I tested driving at night with my hand covering it and the HBA was still working as normal.
Thanks all!
Auto dipping for incoming traffic. Good system
Dims the rearview mirror at night.
HBA sensor is above the RLS at the top middle of the mirror base.
HBA sensor is above the RLS at the top middle of the mirror base.
I think it was only available on vans with full LEDs but someone may be able to correct me. I can't see any reason why the system would need to be led specific though.
Fwiw..
I have OEM LED. =)
Do not have HBA =(
I have a PV with solid bulkhead....so no need for a rear view mirror...
But I have one as its part of the factory vision pack, because the RVM contains sensors for the auto lights, and auto wipers.
Didn't bother with HBA option due to cost.... but now wish I did have it.
.
I have OEM LED. =)
Do not have HBA =(
I have a PV with solid bulkhead....so no need for a rear view mirror...
But I have one as its part of the factory vision pack, because the RVM contains sensors for the auto lights, and auto wipers.
Didn't bother with HBA option due to cost.... but now wish I did have it.
.
HBA in my experience is a waste of time, too slow to react so blinds oncoming vehicles plus only works over a certain speed so in country lanes you generally aren’t going quick enough for it to work.
My experience was with Mercedes though so VW may be better but I didn’t spec it for the reasons above
My experience was with Mercedes though so VW may be better but I didn’t spec it for the reasons above
I’ve got it on my new car and it’s pretty good, although there can be a very slight delay of maybe half a second sometimes, which results in someone flashing you!
HBA can be retrofitted, I've done it and it's quick to react IMO
