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What to expect from heated mirrors

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I got a 2017 Combi just last week. Loving it. 

 

It has heated mirrors. No frost about in Ireland yet obviously, so no real need for them at the moment, but a cursory try of them this morning with dew/rain on the glass didn't seem to have any effect. 

 

I've a 2010 Volvo V50, and the heated mirrors on that are amazing. Frost gets cleared in about 2 minutes. Raindrops just evaporate away. You can feel the heat on your hand if you put it up to the mirror.

I also have a 2010 Ford S Max, and the heated mirrors on it are weak - you can't really feel if they're on, and while frost will eventually clear, the effect isn't very noticeable, and it wouldn't do anything for water droplets. (And from talking to other owners, this is just the way they are).

 

So I'm just wondering what to expect from the Superb. My (limited) experience so far is that it's more like the S Max in this regard. Or is there something up, and should I be experiencing better performance from them? Only error in the car is that the Driver Seat Module isn't working, so the memory function doesn't work (seat adjustment is fine). I haven't gone looking at fuses or wiring or anything - just wanted to get some feedback on the expected performance of the heated mirrors before I decide if this is something that needs to be investigated or not. 

55 minutes ago, GregorSamsa said:

I got a 2017 Combi just last week. Loving it. 

 

It has heated mirrors. No frost about in Ireland yet obviously, so no real need for them at the moment, but a cursory try of them this morning with dew/rain on the glass didn't seem to have any effect. 

 

I've a 2010 Volvo V50, and the heated mirrors on that are amazing. Frost gets cleared in about 2 minutes. Raindrops just evaporate away. You can feel the heat on your hand if you put it up to the mirror.

I also have a 2010 Ford S Max, and the heated mirrors on it are weak - you can't really feel if they're on, and while frost will eventually clear, the effect isn't very noticeable, and it wouldn't do anything for water droplets. (And from talking to other owners, this is just the way they are).

 

So I'm just wondering what to expect from the Superb. My (limited) experience so far is that it's more like the S Max in this regard. Or is there something up, and should I be experiencing better performance from them? Only error in the car is that the Driver Seat Module isn't working, so the memory function doesn't work (seat adjustment is fine). I haven't gone looking at fuses or wiring or anything - just wanted to get some feedback on the expected performance of the heated mirrors before I decide if this is something that needs to be investigated or not. 

Were they actually 'on' - some VAG models need the heated rear screen on to activate the mirrors?

@GregorSamsa- the heated wing mirrors on my Superb MY17 does a good job of clearing frost.

Given u mentioned ur seat memory module is not working - it is likely to affect the heating functionality.

The wing memory position is stored/managed by the seat memory controller.  Maybe the heating is somehow related....

 

@Berisford- u don't need rear window demister on to use the heated wing mirrors.

Edited by JR RS

  • Author

@Berisford the rear window demister was on (and working). I have it set up (via either Carista or Cart Scanner, I can't remember now) for the mirror heat to come on automatically when the rear demister is on. And I only engaged the read demister button - assuming this setting would take care of the mirrors (both the other cars work this way, so I was glad to see this option). I had tried just the setting on the mirror knob before, with similar results (it wasn't apparent that the heating was working). 

 

The mirror glass looks original, and the auto-dimming function works on both sides. Auto dipping the passenger mirror when reversing doesn't work, undoubtedly because the Seat Module is not working and the mirror memory isn't available.

 

I was just looking there at the fuse assignments. The mirror heating elements are on interior fuses 25 and 39, along with the respective sides' central locking, mirror fold in and mirror adjustment. All this stuff works, so I guess I can count this out. 

 

I have a replacement (new) Seat Module on the way. I understand it'll need coding and CP sorted out, so it might be a while before I get that all done, but I'll take a look again after I have that fitted and working. Or I'll wait until the first frosty morning in November and see how it handles it.  

I also have a MY2017. The heated mirror work on their own. I don't need to activate the rear window demister to make them work.

I also use them from time to time to get rid of rain drops on the oustide mirrors. I have to say it's not very quick, but after 4-5 minutes, it's OK. Rain drops vanish.

  • 2 weeks later...

I'll second that, I use mine for rain, which takes just a couple of mins for a soaked mirror to be dry.

 

 

 

 

 

14 hours ago, Gax said:

I'll second that, I use mine for rain, which takes just a couple of mins for a soaked mirror to be dry.

 

 

 

 

 

I third that….!

I much preferred the system on my old mk1 octy where the heated mirrors were on in the central position rather than having a specific position like the current models have which is made worse by leaving it in the left position now so the auto reverse mirror position works.

if there was a VCDS option to permanently enable the heated mirrors in all positions I’d take it!

OP, turn the switch to 'on' and then after a while just feel the mirror, if it is working it will be warm to the touch.  If it's cold then something is amiss.

  • Author

I took a bit of a closer look at lunch, and the mirrors definitely aren't heating. They stay cool to the touch regardless of switch position. My wife took the car then before I could do any more investigation, but I did manage to get a look in behind the glass.

 

I need to get the multimeter out to see what's happening. There's two sets of wires: one set going to the spade connectors in the middle, and one set going to the white connector block. Does anyone know which ones are for the heating element? I assume the others are for the auto dimming.

 

 

mirror.jpg

1 hour ago, GregorSamsa said:

I took a bit of a closer look at lunch, and the mirrors definitely aren't heating. They stay cool to the touch regardless of switch position. My wife took the car then before I could do any more investigation, but I did manage to get a look in behind the glass.

 

I need to get the multimeter out to see what's happening. There's two sets of wires: one set going to the spade connectors in the middle, and one set going to the white connector block. Does anyone know which ones are for the heating element? I assume the others are for the auto dimming.

 

 

mirror.jpg

the two wires not going through the connector are the heated mirror ones

  • 2 months later...
  • Author

I was a bit slow getting back to this, but finally did some more investigation tonight. 
 

Took out the mirror glass and hooked it up to a 12v supply inside the house. Mirror started heating instantly. So I know the element is good. 
 

Then I went out to the car with the multimeter and clipped it onto the heating wires. Turned on the ignition, and got a reading of 12.46 volts. This was with the mirror switch in the 0 position. Switching it to the heat position didn’t change the voltage.

 

I then put the mirror back and turned on the ignition. The mirror didn’t heat up. 
 

Can anyone explain to me:

 

1. Why I’m getting 12v with the heating turned off?

 

and 

 

2. Why the mirror isn’t heating if it’s getting 12v?

 

Clearly I’m not understanding something fundamental here. 

A2381E27-E593-43C7-AB24-4AA82306B105.jpeg.ea19aff2298cedfbe8dc68cf30b18e4c.jpeg

 

Measure the voltage with the wires connected to the mirror heating element, it should then read close to zero volts with the switch in the off position and something a bit less than 12v with it on the heating position.

 

What you are probably seeing is a small control current to detect if the element is working or not or short circuited.

  • Author

Makes sense @J.R., thanks. 
 

measured it there, and it’s 0v regardless of whether heating it turned off or on.  So there’s the problem. 
 

E2FD5E91-993F-416A-B5CF-B58387BD7039.jpeg.c2c21693da0e14257a1bdc941f90ecd1.jpeg


As suggested above, it could be related to the seat module that doesn’t work. I still haven’t got around to getting that fixed. I think I’ll look into getting that done and see how I get on. 

On 18/08/2021 at 13:07, GregorSamsa said:

I got a 2017 Combi just last week. Loving it. 

 

It has heated mirrors. No frost about in Ireland yet obviously, so no real need for them at the moment, but a cursory try of them this morning with dew/rain on the glass didn't seem to have any effect. 

 

I've a 2010 Volvo V50, and the heated mirrors on that are amazing. Frost gets cleared in about 2 minutes. Raindrops just evaporate away. You can feel the heat on your hand if you put it up to the mirror.

I also have a 2010 Ford S Max, and the heated mirrors on it are weak - you can't really feel if they're on, and while frost will eventually clear, the effect isn't very noticeable, and it wouldn't do anything for water droplets. (And from talking to other owners, this is just the way they are).

 

So I'm just wondering what to expect from the Superb. My (limited) experience so far is that it's more like the S Max in this regard. Or is there something up, and should I be experiencing better performance from them? Only error in the car is that the Driver Seat Module isn't working, so the memory function doesn't work (seat adjustment is fine). I haven't gone looking at fuses or wiring or anything - just wanted to get some feedback on the expected performance of the heated mirrors before I decide if this is something that needs to be investigated or not. 

Found the heating effect on my 68 Reg SEL-Exec disappointingly slow to come on & barely discernible as warm compared to all previous estates, including a 65 reg Octy Scout & B5 Passat estate.
so had a fiddle with the settings options on the large screen & wherever it’s found there is a slider option for the heating strength for the mirrors. This was set at the low end & increasing the heat was disabled for some reason. Anyone know why/how that should be? I did wonder if it was related to battery charge level … that would make sense for high heat must draw significantly more current. Oh … same for the rear heating element for that matter in terms of how slowly it demists.
Maybe time I went for a longish daytime run!

Edited by MikeM46
Typos

  • Author

@MikeM46 a “68” reg is late 2028/early 2019, is that right? I’m not very familiar with the UK reg system. 
 

Where exactly in the menus was this option? I don’t think my 2017 car has it. Maybe it’s an MIB 2.5 thing. 

Edited by GregorSamsa

I have owned my Yeti for 2 years now & still don't actually know if the heated mirrors work and/or how to operate them/how they should operate.

 

I tried to use them this morning but did not see any change through having done so, on previous cars they came on with the rear screen heater, not sure if they do on this one, the mirror control manette has a mirror heating position, I switched it to that this morning but it didn't seem to make any difference, maybe its to disable the function?

 

Having taken a vow never to read an instruction manual does make some things a little more difficult but it simplifies the majority!!!!

On 09/11/2021 at 09:38, GregorSamsa said:

@MikeM46 a “68” reg is late 2028/early 2019, is that right? I’m not very familiar with the UK reg system. 
 

Where exactly in the menus was this option? I don’t think my 2017 car has it. Maybe it’s an MIB 2.5 thing. 

Mine first registered July 2018. Yes  68 covers early 2019 as well. 
Will have to scrabble around & find my way back to where this slider is!

 

 

 

22 hours ago, J.R. said:

I have owned my Yeti for 2 years now & still don't actually know if the heated mirrors work and/or how to operate them/how they should operate.

 

I tried to use them this morning but did not see any change through having done so, on previous cars they came on with the rear screen heater, not sure if they do on this one, the mirror control manette has a mirror heating position, I switched it to that this morning but it didn't seem to make any difference, maybe its to disable the function?

 

Having taken a vow never to read an instruction manual does make some things a little more difficult but it simplifies the majority!!!!

 

Were the mirrors dry, i e. no moisture, no ice before you tried this? In which case you won't notice anything, they don't glow red or anything when they're up to temperature 🙂

 

Easy test: when you are next going out, put some water on the mirrors before you go, and switch the dial to the heated position. If they work then the water drops will dry up within a few minutes, where normally they'll just stay there unless you go at motorway speeds for half an hour.

 

In the Superb it activates when you turn it to the heated position, I imagine yours will be the same.

 

 

Edited by Gax

Thanks, yes I know how they should work from previous Skodas, the last 18 months since I got it have been anything but normal so they have not been needed and any lack of performance has not yet been seen.

 

Good to know that I need to manually select them, I will experiment to see if they come on with the heated rear screen.

 

30 years ago in the days of pay per word small ads in Expand & Fart etc I could have written HRS and everyone would have known what I meant, not these days!

On 09/11/2021 at 09:38, GregorSamsa said:

@MikeM46 a “68” reg is late 2028/early 2019, is that right? I’m not very familiar with the UK reg system. 
 

Where exactly in the menus was this option? I don’t think my 2017 car has it. Maybe it’s an MIB 2.5 thing. 

Mine first registered July 2018. Yes  68 covers early 2019 as well. 
Will have to scrabble around & find my way back to where this slider is!

 

 

 

On 10/11/2021 at 15:49, MikeM46 said:

Mine first registered July 2018. Yes  68 covers early 2019 as well. 
Will have to scrabble around & find my way back to where this slider is!

 

 

 

So starting with the single car image on the central  screen press and press the cogs image bottom right to bring up “Convenience Consumers”. Then, with the ignition on turn the wing mirrors heating on from the driver door panel and on the screen this is signified by an all green strip. 

Then turn on the rear window heating and that comes up as well but not green all the way & meanwhile the Green strip for the wing mirrors recedes. If you then turn aircon on that green strip comes on & alters the other two.

But these are not sliders, they’re indicators, probably showing “strength of operation” of each from a shared supply of current? Well at least for the two glass heating systems. 

Makes sense I guess if only the wing mirror heating is on that is the coldest context in cold weather being external to the car so full heat. But if the rear screen heating is needed, given that requires far more current from a total limited amount it will “take” some of the feed to the wing mirrors?  And the aircon has a role to play as well assuming it’s distributing warmth internally & so diminishes the current feed to the rear element while it warms up the interior. 

Well that’s  my inexpert guess but for all I

Know this might also be coupled to battery status monitoring so that the heating element feeds diminish if/when the battery charge is low  & charge rate cannot keep up with current demand & threatens battery discharge?

Anyway, still means the wingmirror heating is relatively limited when both side & rear elements are on … must go for a long daytime run & get the battery charged up & check again. 


 

 

  • Author

I think those bars in Convenience Consumers show the proportion of fuel consumption for each system in relation to each other, rather than a distribution of electrical power. 
 

In any case, it’s interesting because when I turn on the switch for my heated mirrors, it doesn’t show up on that screen - confirming that they’re not working at all. 

  • 3 years later...

Hey,

when you say heat position, are u talking about the mirror or talking about the heating from the car too? 

On 10/11/2021 at 17:44, Gax said:

Were the mirrors dry, i e. no moisture, no ice before you tried this? In which case you won't notice anything, they don't glow red or anything when they're up to temperature 🙂

 

Easy test: when you are next going out, put some water on the mirrors before you go, and switch the dial to the heated position. If they work then the water drops will dry up within a few minutes, where normally they'll just stay there unless you go at motorway speeds for half an hour.

 

In the Superb it activates when you turn it to the heated position, I imagine yours will be the same.

 

 

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