Hi Rico 
I would give Mackies a ring and discuss those codes and see what they say, they have the most experience and any advice from experts is good free advice.
Good luck with sorting - from someone who has been through the pain!
18223/P1815 - Pressure Control Valve 1 (N215): Short to Plus
Possible Causes
Wiring from/to Pressure Control Valve 1 (N215) Short to Plus
Pressure Control Valve 1 (N215) faulty
Possible Solutions
Check Wiring from/to Pressure Control Valve 1 (N215)
Check Pressure Control Valve 1 (N215)
Check Measuring Blocks
Special Notes
Pressure Control Valve 1 (N215) might be referred to as Solenoid Valve 4 (N91)
Start with checking connectors for corrosion or water damage, in case of 01V transmission pay special attention to 16-pin connector between valve body and wiring harness.
__________________
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Audi A8 D2 3.7 Quattro Sport 1999 FL - Melange
2nd Place Winner - A8-Freunde Annual German Meet 2012 at Edersee
20" x 9" Bentley GTC Wheels with 385mm W12 Front Discs & Bentley Caliper Covers, Front Lowered on Coilovers, Xenons, Combined DRLs and LED Foglights to modified OEM front fog lamp position, Alcantara/Leather, Full Black Alcantara headlining + pillars and blind shelf, Bespoke Flat Bottomed Sports Steering Wheel, Dark Myrtle Wood, Autodim Mirrors, Bose, Blinds, Digital TV, Ski Hatch, Modified rear exhaust section for extra V8 Burble 
Audi S8 D2 Final Edition 2002, Avus Silver with Red Leather Interior
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Audi A8L D2 4.2 Petrol with LPG - Ebony Black
Audi A8L D4 FL 4.0T Petrol twin turbo - Havana Black
Audi A2 1.6 FSi Sport - Dolphin Grey with Votex body kit and Red Leather Interior
and some other A8's A8L's and Mercs
Last edited by Architex_mA8tey; 7th September 2017 at 11:09 AM.
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