Add Bluetooth to Mercedes Head Units for less than $10

Add Bluetooth Audio and phone talk to your old Mercedes Head unit for less than $10, this is possible by adding a small aftermarket Bluetooth module in the back of your old unit.

Please note that I am not a sponsor for the bellow merchandise:

https://www.ebay.com.au/itm/364541768...

This can be applied to most Mercedes Benz from 2002 to 2010.
CLK Class
Eclass
Cclass
Sclass
CLClass
W203
W204
W209
W210
W211
W221