For Mercedes Benz W212 from 2009 to 2015(ntg4.0 to ntg5.0), if the car don't come with original ambient light, or just 1 color / 3 colors ambient light, we offer the products to upgrade it to 12 colors.
Here's the product link: Mercedes E Class W212 12 Colors Ambient Light
Welcome to contact with us sales@incarpassion.com if you are interested in upgrading the interior lighting.



If the car don’t have original ambient light, need to install the light strip, complete set product picture as below:


If the car have original 1 color or 3 colors ambient light, can upgrade to 12 colors ambient light, just change the harness, no need install led strip; product picture as below:

whats the install like if we already have the ambient light option. changing the harness require to take the door panels, all dash trim etc?

Interesting

Your website says:
Compatible car model
Mercedes E W212 Class W212 2012-2016

but your post says:
2009-2015 models

also, I don’t see a price on your website nor install instructions.

yes, eaxctly, need to change original ambien lighting harness to ours.

From 2009-2016 is ok. Because some countries, 2016 E Class is already W213, some countries still W212, so it depends, as long as it is W212, it is ok