I just come back from Mercedes ......! they don't find the ref of the blank key whatever ignition or hand box .... they said : we keep looking at....! so i wait 
Tomrow i'll go to a locksmith shop and ask ( closed on Monday here)
Please tell them:
VIN 113044
Group 44 Steering
Subgroup 001
Switch off the filters
They will find:
A 000 760 04 06 Master Key (available from Germany, EUR 25-30); Note there: as of chassis 043 002980
This is for the newer steering column set up.
For the older steering column:
A 111 462 01 32 Key, Note: NLA
That is for the ignition switch.
Now for the door lock:
Group 72 Front Door
A 000 766 11 06 Key, Note: up to chassis 044 010355, state lock number when ordering (that is why I think transition for other keys happened later than for the ignition key); availability unknown
A 000 766 19 06 Key, Note: up to chassis 044 010355, NLA
A 000 766 38 06 Key, available
A 000 766 40 06 Key, not available
A 000 766 44 06 Key head and mounting wedge for Master Key; Note: as of 044 010356; available
A 000 766 45 06 Key head and mounting wedge for secondary key; Note: as of 044 010356; available
In essence: at Mercedes they will have a Master key and secondary key for one-key cars. They will not have earlier versions. For earlier versions you would have to identify the profile based on data card and have the keys and locks made. Locksmith will fit the key to lock or lock to key, but will not change the lock profile - this goes with the cylinder.
Also: if the car was not a one-key car, keys for doors and fuel were the same. Keys for trunk and glove compartment were the same (privacy zones logic for valet parking).