W204 C180 Executive SE 2013 Automatic / COMAND NTG4.7 and Morel speakers fitted by www.comand.co.uk
The memory package also includes the electrically folding side mirrors.
If you have the full-electric seats, then I am assuming you'll need new side mirrors (if yours aren't electric), new door switches with the memory buttons and the wiring looms to the connect to the door control module, and SCN coding.
You will need a seat control module fitted to each seat, new seat motors, new front door cards to take the additional switches, new steering column to convert to electric as this is part of the memory package, also key dependent memory is part of the package.
As stated above about door mirrors folding, even if you have folding mirrors if you will need to replace the mirror motors.
There are many many aspects of the memory package on the 219.
I wouldn't attempt this without a complete donor car.