2018 Audi A6 CNGA/CSLA (4G)
4G / Sedan / Avant (station wagon) / Global - varies by market; primarily Europe, North America, China
CNGACSLACSLBCYNBF4CDELADELA2DNWAExact year/trim recordSilver
Engine identity
Oils and fluids
Service and parts data
Common and chronic problems
- Timing chain tensioner issues on some V6 engines
- Carbon buildup on direct injection petrol engines
- DPF clogging in diesel variants especially with short trip driving
First checks
- Verify proper service history especially oil and timing chain maintenance
- Check for soot and exhaust system condition on diesel models
- Inspect for software updates applied for engine management
Before replacing parts
- Save fault codes and freeze-frame data before clearing anything.
- Check engine oil, coolant and transmission fluid using the correct temperature and service procedure.
- Verify power, ground, connectors, hoses, leaks and live data before replacing expensive parts.
Important notes
- Engine and feature availability varies widely by market due to emissions regulations and local preferences.
- Oil capacity figures and maintenance intervals depend on engine variant and market-specific manuals.