Also, one of the Mercedes owners confirmed that he did not use resistors with these bulbs (check the link) and they do not flash fast:
http://www.benzworld.org/forums/w164-m-class/1620061-led-lights.html
I would try these in a CX-9 - they are cheap.
http://www.benzworld.org/forums/w164-m-class/1620061-led-lights.html
I would try these in a CX-9 - they are cheap.