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2018 Audi A6 Mk5 (C8)

Browse our directory of 2018 Audi A6 Mk5 (C8) vehicles. Access instant MOT history reports, tax status, and reliability insights for any registration listed below.

Registration Directory

0194 LWW1000 NP100 ARB100 CPE100 SCH101 GW102 GW103 MK104 JNW10 CEC10 CJT10 DNL10 EOF10 FLA10 FY10 HK10 HXH10 JNC10 MAY10 OXA10 SER10 STJ110 GD1111 DC111 HDX111 POW113 RHM114 FLY1155 CR116 ON117 VM1180 MM11 DRS11 JAX11 JDP11 LAP11 MEB11 MJA11 NCP11 PKH

Showing registrations 1–40 of 40 for the 2018 Audi A6 Mk5 (C8). Select any plate for an instant vehicle history check.

Common Problems & Reliability

3
Serious
2
Moderate
0
Minor

The 2018 Audi A6 Mk5 (C8) has 5 known issues. 3 of these are classified as serious faults that could be expensive to repair. 2 are moderate concerns worth inspecting before purchase.

Belt Starter Generator (BSG) Failure

Serious

The 48V mild-hybrid system can fail, leading to an "Electrical system: fault" message.

Symptoms: Warning messages, Total electrical failure while driving

Est. repair cost: £0–£1,500

DL382 S tronic Gear Selection / Mechatronic Faults

Serious

Control or clutch faults can interrupt gear selection. Identify the gearbox code first: this entry applies to the longitudinal DL382 family, not every automatic sold under the same model name.

Symptoms: Gearbox warning, Delayed engagement or missing gears

TDI AdBlue / NOx Sensor Faults

Serious

SCR dosing or NOx sensor faults can trigger an emissions warning and a no-restart countdown. Adding fluid alone does not resolve every system fault.

Symptoms: AdBlue system fault, No-restart countdown

Dual MMI Touch Response Screen Freezing & Blackouts

Moderate

The dual upper (navigation/media) and lower (climate/haptics) touchscreen displays can fail to initialize, suffer touch input lag, or reboot randomly while driving.

Symptoms: Lower climate screen unresponsive to haptic touch, Upper display freezes on Audi logo...

Est. repair cost: £0–£650

2.0 TDI / 3.0 TDI Coolant Regulation Valve & Water Pump Weepage

Moderate

Electrically controlled coolant regulator shut-off valves and vacuum-actuated water pump plastic housings develop weeping leaks, coating the front of the block in crusty pink residue.

Symptoms: Low coolant warning chime, Coolant level steadily drops over 1,000 miles...

Est. repair cost: £380–£850

View detailed Audi A6 Mk5 (C8) fault guide

Buying Tips for the 2018 Audi A6 Mk5 (C8)

  • ✓Ensure the Belt Starter Generator (BSG) recall has been performed
  • ✓Check both touchscreens for responsiveness
  • ✓Verify AdBlue and NOx sensor health

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