Diagnostics done.

Here's the results, don't know if anyone has any answers out there?

Address 01: Engine Labels: None
Part No: 06A 906 018 BT
Component: 1.8L R4/5VT MOTR HS V04
Coding: 04000
Shop #: WSC 00020

2 Faults Found:
16706 - Engine Speed Sensor (G28): No Signal
P0322 - 35-10 - - - Intermittent
16487 - Mass Air Flow Sensor (G70): Signal too High
P0103 - 35-10 - - - Intermittent
Readiness: N/A

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Address 03: ABS Brakes Labels: 1J0-907-37x-ABS.lbl
Part No: 1J0 907 379 E
Component: ABS/EDS 20 IE CAN 0001
Coding: 12812
Shop #: WSC 00020

No fault code found.

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Address 08: Auto HVAC Labels: 7M0-907-040.lbl
Part No: 7M0 907 040 AT
Component: CLIMATRONIC MPV V110
Coding: 00011
Shop #: WSC 00020

1 Fault Found:
65535 - Internal Control Module Memory Error
00-00 - -

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Address 09: Cent. Elect. Labels: None
Part No: 7M0 962 258 F
Component: Multifunkt.Einheit 0001
Coding: 04097
Shop #: WSC 00000

1 Fault Found:
01135 - Interior Monitoring Sensors
35-10 - - - Intermittent

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Address 15: Airbags Labels: 1J0-909-60x-VW3.lbl
Part No: 1J0 909 603 AA
Component: AIRBAG VW3 - V04
Coding: 16705
Shop #: WSC 00020

1 Fault Found:
00532 - Supply Voltage B+
07-10 - Signal too Low - Intermittent

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Address 17: Instruments Labels: 7Mx-919-xxx-17.lbl
Part No: 7M1 919 932 A
Component: Kombiinstrument 066a
Coding: 00124
Shop #: WSC 00020

No fault code found.

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Address 25: Immobilizer Labels: None
Part No: 7M0 953 257 R
Component: IMMO VWZ3Z0W0273523 V68
Coding: 09600
Shop #: WSC 00476

1 Fault Found:
01176 - Key
65-10 - Unauthorized - Intermittent

I did find that the MAF sensor wasn't seated properly, sorted that now and the car seems a bit gutless. Before you could really hear the turbo whistle up but it doesn't now.

I believe if you haven't read the codes for a while you should clear them and re scan then after a day or two. By doing that you clear any codes that are still listed but no longer relevant.

Seen these codes a few times battery voltage is low or its been disconected at some point hence the codes on the engine and the airbag one,just re-set it and see what comes back as explained above!