308 t7 - different Rear view mirrors

[bulkier]

Hi,
I have two 308 t7 and both by VIN number have "ELECTROCHROMATIC DAY-NIGHT INTERIOR MIRROR" but they are quite different!

On VF3**************[VIN obfuscated, can be read by forum staff] there is one sensor in front and one on the back, no buttons:

On VF3**************[VIN obfuscated, can be read by forum staff] there are TWO sensor in front (why?!?) and one in the back and one button:

I wanted to switch these two mirrors but it seems that they will not work... will it?

Are both mirrors ELECTROCHROMATIC? Like it it state in VIN document?

[RichardW]

Both are stated as electrochromatic, but one is listed as with switch and one without.... no idea what the switch does.

[PaulC5]

We had a mirror with a switch on, may have been our 2004 C5, and it darkened it to help stop being dazzled by car headlights behind. Others without a switch (or lever) have darkened automatically. On the lower photos, the switch might be the button on the bottom of the mirror.

[Paul-R]

I had a switch on our Mk1 C5 mirror. IIRC it switched out the automatic darkening of the mirror.

[GiveMeABreak]

The older ones had a switch to turn the electrochrome function on or off, but later ones have a sensor to detect the light entering the vehicle from the rear and darkens automatically. When reverse gear is selected, it then lightens automatically for the manoeuvre.