Whetstone Audi want £20 for the code, and they want to see the car and Radio. Looks like I'll be sticking in a Blaupunkt aftermarket CD player that I have laying around, at least it has the same pinouts so has half a chance of driving the factory amp.

I did have a CD somewhere that can be used in the drive to reset it and during that process it throws up a code which the last four digits of which are the passcode. It worked on an RNSe unit I was lent for an A3. I'll have to see if I can find it!!

Quick update time,

Spent last weekend ripping out loads of extra wiring.

So out with the remainder of the aftermarket headunit, there was an external satnav module and also a GPS aerial buried behind the glovebox.

Also removed an antique Nokia in car phone system complete with cradle and aerial that had also been hidden behind the glovebox out of sight.

Still not got the code for the radio from Audi, so I took up plan B and installed my old Blaupunkt Woodstock DAB52. As the factory Concert was also made by Blaupunkt the Woodstock had all the same connections so it's installed and also powers the factory amp thats driving the rear speakers. Result is perfect audio from all the speakers, I don't think the rear speakers have worked for sometime but the sound is much improved. Only issue was the power to the unit, as VAG have the red/yellow reversed from standard but have that sorted as well.

Now the only real issue is the gearbox, the 6 speed CVT is known for judder at low RPM which develops over time. I can only assume this has been like it for a very long time, so it may keep going. Its not a very nice drive around town, if you maintain light throttle you can see the RPM vary up/down slightly as you drive along. It's possible to drive around it by using pseudo manual mode, and keeping the revs over 2000 rpm where the issue disappears.

I've driven the car 400 miles now, and apart from the box issue it seems quieter than the D3 but not as comfortable to sit in. It's quieter because unlike my D3 there is no whine from the NSR backend that I've been plagued with on the D3 for 18 months.

CVT stands for Continuously variable transmission, there are no speeds or gears as such, it is constantly variable as the name suggests.

Daughter sold her A6 last week, she had it MOT'd a couple of weeks ago and decided to sell it as she's driving the TT more then the A6.

so how can a mannyo have a 6 speed ?

incidentally my daughter has a CVT on her A6 Avant which has passed 100k and is as quiet as when new

These are 6 predetermined ratios, but essentially any ratio within the gearbox range could be available.

Good video here
https://youtu.be/MhFK5gfAGpM?t=1m31s

That video shows a cone CVT, whereas Audi Multitronic system uses a link-plate chain drive. But the principle is the same by varying the size of the input and output to give a infinite ratio between the max and min.

I guess giving the box these ratio points gives the user familiarity with a regular manual box and the ability to control the speed with throttle.

Essentially that, you move the selector from D to the tiptronic setting and the display changes to 654321 and you get six predetermined ratios.

I've asked Poole Audi for a quote to renew the CVT oil and get the radio code, so waiting for their response.

Just scanned the car with VCDS, this is what we have after 500 miles.

Chassis Type: 4B - Audi A6 C5
Scan: 01 02 03 06 08 15 16 17 18 22 34 35 36 37 45 55 56 57 65 67
75 76 77

-------------------------------------------------------------------------------
Address 01: Engine Labels: 078-907-552-AMM.lbl
Part No: 3B0 907 552 AE
Component: 2.4L V6/5V G 0002
Coding: 11582
Shop #: WSC 02435
VCID: 67D9BFAF2FFD
WAUZZZ4BZ1Nxxxxxx AUZ7Z0Y1528463

3 Faults Found:
17748 - Camshaft Position Sensor (G40) / Engine Speed Sensor (G28): Incor. Correlation
P1340 - 35-10 - - - Intermittent
16804 - Catalyst System; Bank 1: Efficiency Below Threshold
P0420 - 35-00 - -
16814 - Catalyst System; Bank 2: Efficiency Below Threshold
P0430 - 35-00 - -
Readiness: 0000 0001

-------------------------------------------------------------------------------
Address 02: Auto Trans Labels: 01J-927-156.lbl
Part No: 01J 927 156 DR
Component: V30 01J 2.4l 5V RdW 1670
Coding: 00001
Shop #: WSC 04926
VCID: 7F0907CF576D

No fault code found.

-------------------------------------------------------------------------------
Address 03: ABS Brakes Labels: 8E0-614-111-ASR.lbl
Part No: 8E0 614 111 AP
Component: ABS/ASR 5.3 FRONT D00
Coding: 00033
Shop #: WSC 02325
VCID: 6CD3C083361B

No fault code found.

-------------------------------------------------------------------------------
Address 08: Auto HVAC Labels: 4B0-820-043-MY1.lbl
Part No: 4B0 820 043 H
Component: A6-Klimavollautomat D64
Coding: 00061
Shop #: WSC 02435
VCID: 1F49E74FB72D

No fault code found.

-------------------------------------------------------------------------------
Address 15: Airbags Labels: 4B0-959-655-AI8.lbl
Part No: 4B0 959 655 G
Component: Airbag Front+Seite 1001
Coding: 01106
Shop #: WSC 02325
VCID: 346318E32EAB

No fault code found.

-------------------------------------------------------------------------------
Address 16: Steering wheel Labels: 4B0-907-487.lbl
Part No: 4B0 907 487
Component: E Lenkrad Elektronik D03
VCID: E9DD3997B9E9

No fault code found.

-------------------------------------------------------------------------------
Address 17: Instruments Labels: 4B0-920-xxx-17.lbl
Part No: 4B0 920 981 C
Component: C5-KOMBIINSTR. VDO D12
Coding: 00462
Shop #: WSC 01234
VCID: 2647F2ABE877

Part No: WAUZZZ4BZ1
Component: 38548 AUZ7Z0Y1528463
WAUZZZ4BZ1ˇˇ38548 AUZ7Z0Y1528463

No fault code found.

-------------------------------------------------------------------------------
Address 35: Centr. Locks Labels: 4B0-962-258.lbl
Part No: 4B0 962 258 H
Component: Central Lock/Alarm D33
Coding: 04814
Shop #: WSC 02435
VCID: 2E570A8BC087

3 Faults Found:
01560 - Passenger Door
60-00 - Won't Safe
01562 - Right Rear Door
61-10 - Won't De-Safe - Intermittent
01134 - Alarm Horn (H12)
49-00 - No Communications

-------------------------------------------------------------------------------
Address 45: Inter. Monitor Labels: 4B0-951-173.lbl
Part No: 4B0 951 173
Component: Innenraumueberw. D03
Coding: 00001
Shop #: WSC 02435
VCID: E0CB24B34AD3

No fault code found.

End ---------------------------------------------------------------------

Concerned about the 17748, especially considering the engine was rebuilt 10K ago after a cambelt failure to the tune of £4000. 17748 suggests that the timing is out on one of the banks, remembering that I have already replaced the bank 1 camshaft position sensor with a new OEM one because the old one was not working at all.

Also gave the car a good clean and wax, there is a surprising amount of rust when you look close enough, thank goodness the D3 is made of aluminium.

And some fresh pictures from the clean now below.