A little back ground first.

Last year I wanted to install the face lift 2014 L319 Disco 4 wing mirrors to my sport so I bought a used unit of ebay to see how it all worked. It was cheap so I was happy to take it apart and give it a clean etc. Everything was good and it had water wading and blindspot alert in the glass......happy days.

So my next step was to buy the other side and it took a while for one at a good price to turn up. One did turn up but it didn't have the water wade or blind spot alert. So I then ended up buying a cheap NEW L405 mirror so I could rob the parts off it to make a pair of mirrors for my car to the same spec.

Fast Forward 8 months and I'm driving down the A17 in traffic and a car drives up behind me with badly adjusted head lights. The interior mirror dims nicely but I'm being blinded by the wing mirrors and I think to my self, I wonder if the electrochromatic wing mirrors can be made to work?

The L320 and L319 never had (AFAIK) Electrochromatic wing mirrors fitted so I thought it was going to be difficult. I looked at the 2002 - 2009 L322 wiring diagram with the idea of trying to retro fit the 02 - 09 L322 mirror and extra wiring for the wing mirrors. I decided against it as the mirror looked a little out of date. Next I looked at the 2010 to 12 L322 and the wiring diagram for that interior mirror showed an 8 way connector like the L320, it visually looked the same as the L320 but it had the needed additional connections. I then took the part number of the 10 - 12 interior mirror that had all the options against it and put it in to ebay search. I made an offer on one of the search results and got it for £15 and it had the additional homelink as well (Not that I need it or have a use for it). I also found as a result of the ebay search that the part number was also fitted to the 2014 -16 L319 (Which is the vehicle it came from) so I knew it would fit the L320.

So the next step was to take a look at what I had in my car. I removed the covers and removed my existing mirror and fitted the new mirror. It was exactly the same except for the homelink button!



10 -12MY L322 Wiring Diagram

Click image to enlarge

Click image to enlarge

Top work

Personally I don't like my left mirror dimming, as it can make it difficult to see cyclists. So if you drive it those conditions....

Note to others. It only takes about 2V on the glass to fully dim the mirror.

Is that on a sport?

It only appears to dim when there is a bright light behind the car. To make it work in the daylight I needed lights on, cover the sensor on the front of the mirror and shine my phones light on the mirror sensor. As soon as I took the light away from the mirror sensor it returned to normal. Hence the poor photos, by the time I’d turned the camera on (and the light went out) the darkness of the glass was returning to normal. 2019 5.0 SC SVA (Current)
2012 5.0 SC AB. Sadly written off by a campervan
23 plate Focus ST (Current)
1942 VEP Ford GPW Jeep (Willys) (Current)
1943 Whites M16 Halftrack (Current)
16 plate Eurofighter Typhoon, 2 x Eurojet engines with 20,000lbs thrust each. 1380mph

You have a PM Brit Plumber

That was on a jag.
Yeah it looks for a difference between front and rear.

Cyclists have brighter lights these days so I would probably seen them in A
Dimmed mirror