A genuine VCDS/VAGcom seller based in UK where I got mine from (there are others) invaluable IMO & probably others would agree who have...
http://www.gendan.co.uk/product_VCHU.html
Instructions from a Russian forum
There are successful experiences enable graphical display parking sensors on the MMI.
This method was tested on my A6 and is for informational purposes. Remember that all operations are conducted at your own risk. : Rotate:
The procedure is as follows:
1. Enjoying a block number, which is installed on the machine. It is located right in the A6 for paneling in the trunk, you can not shoot. (See photo).
Block Number: 4F0 910 283. Particular attention is directed to bukovku at the end! If you have C, E or H, then everything is OK (go to step 3), if A is - you need to change the block on N.
2. Buy a box (most modern H) and without any problems for 1 minute install a new one.
3. Making changes in the VAG:
1) Connect the VAG;
2) Select the section 76 (Park Assists);
3) Select the Coding;
4) Change the second number: 2 (0? Xxxxx);
5) Click do it!
4. That's it!
If everything is done and does not work, you must update the software on the MMI (from any dealer for 30 min.).
5. Enjoy!
Info on modules
It only works on certain modules
4F0 919 283 - won't work on all revisions
4F0 919 283 A - won't work on all revisions
4F0 919 283 B - can be enabled using VAGCOM
4F0 919 283 C - can be enabled using VAGCOM
4F0 919 283 D - can be enabled using VAGCOM
4F0 919 283 F - enabled from the factory
4F0 919 283 H - enabled from the factory
It's likely you have one of the first modules that did not support the graphic display.
Here is additional info on the modules:
4F0 910 283 - 4 sensors, no graphical support
4F0 910 283 A - 4 sensors, no graphical support
4F0 910 283 B - 4 sensors, graphical suppor
4F0 910 283 C - 8 sensors, graphical support
4F0 910 283 D - 4 sensors, graphical support
4F0 910 283 E - 8 sensors, graphical support, rear view camera support
4F0 910 283 F - 4 sensors, graphical support, rear view camera support
4F0 910 283 G - 8 sensors, graphical support, rear view camera support
4F0 910 283 H - 8 sensors, graphical support, rear view camera support
Those with back up sensors on C6 A6 cars, just got help on ability to add parktronic graphic via vagcom. Hope this helps others, as it is a nice easy feature to add.
Open Module [76] - Parking Aid
Short Coding:
0?xxxxx: Optical Illustration
0 = without Optical Illustration in Display
2 = with Optical Illustration in Display
Save changes, then enable Graphic display in MMI under the Parking menu. (Click yes when prompted for default work group coding from VCDS)
My oem coding went from 0001206 to 0201206
Not my work from my knowledge base..
For your reg of car you should have a newish module will heck tomorrow.. parking sensors last time I ask at a dealer (inc.painting) was near enough a £100 (a piece as 4 are used per bumper)