I decided to upgrade my head unit to comand 2.0 and get rid of the old outdated audio 10 head unit. Also I wanted a AUX Connection 
I did not want a aftermarket because I wanted a original Mercedes unit.
First Step All images are attached
Buy a Comand 2.0 (I brought mine for £150.00 which is cheap)
Also you will need a Conversion Kit adapter cable for Mercedes audio 10 to Command ( Got it for £15.00)
Mercedes Comand 2.0 aux input 3.5mm jack lead ( £10.00)
Buy a GPS Atenna that fits into the system ( £6.00)
Second Step
Once you receive all the things get the Command AUX 18 pin plug and open it up PIN 5, PIN 4, PIN 14 AND PIN 13 should be occupied by the 18 pin hole connection. Take a note of the four wires in which wire belong in the numbered PIN holes I just labeled them. (red PIN 4, White PIN 13 etc..)
MAKE SURE YOU TAKE A NOTE OF THE 4 WIRES AND PIN HOLES
Then open up the aux to access the 18 pin hole connection and add the wires you took out from the AUX cable to the required pin holes. ( They just click in) see pics if you get confused.
REMEMBER YOU ARE TAKING THE WIRES FROM THE AUX CONNECTION AND CONNECTING TO THE CONVERSION HARNESS LOOP 18PIN HOLE.
Now you have Aux sorted no more CDs
Now just fit all the cables onto the command system all the wires should be the same as audio 10 in the comand 2.0 (not including the 18 Pin hole connection.) Then just screw everything back together :thumbsup:
Now you are connected with your new system
If you think it cost too much money don't worry I sold my Audio 10 with the tray for £90.00
I did not want a aftermarket because I wanted a original Mercedes unit.
First Step All images are attached
Buy a Comand 2.0 (I brought mine for £150.00 which is cheap)

Also you will need a Conversion Kit adapter cable for Mercedes audio 10 to Command ( Got it for £15.00)

Mercedes Comand 2.0 aux input 3.5mm jack lead ( £10.00)

Buy a GPS Atenna that fits into the system ( £6.00)

Second Step
Once you receive all the things get the Command AUX 18 pin plug and open it up PIN 5, PIN 4, PIN 14 AND PIN 13 should be occupied by the 18 pin hole connection. Take a note of the four wires in which wire belong in the numbered PIN holes I just labeled them. (red PIN 4, White PIN 13 etc..)

Then open up the aux to access the 18 pin hole connection and add the wires you took out from the AUX cable to the required pin holes. ( They just click in) see pics if you get confused.
REMEMBER YOU ARE TAKING THE WIRES FROM THE AUX CONNECTION AND CONNECTING TO THE CONVERSION HARNESS LOOP 18PIN HOLE.



Now you have Aux sorted no more CDs
Now just fit all the cables onto the command system all the wires should be the same as audio 10 in the comand 2.0 (not including the 18 Pin hole connection.) Then just screw everything back together :thumbsup:
Now you are connected with your new system





If you think it cost too much money don't worry I sold my Audio 10 with the tray for £90.00