Audi A6 e-tron quattro Mk1

The PPE platform's new-generation infotainment system has been a consistent source of complaints from early owners. Reported issues include complete MMI screen freezes requiring a restart, loss of internet connectivity (blocking myAudi app functions such as remote charging status, climate control, and door locks), radio going silent during drives, navigation display turning a blue hue randomly, and the system forgetting saved radio stations and addresses. Audi has acknowledged software issues on PPE vehicles and has been releasing updates, but the 2026 model year's improved user interface will reportedly not be retrofitted to 2025 models. Some owners have had their infotainment CPU physically replaced by dealers, which resolved persistent issues. Most software problems are covered under warranty and cost nothing, but out-of-warranty CPU replacement could cost €500-800.

Like other Audi EVs, the high-voltage battery does not automatically top up the 12V battery when the car is parked. If left unused for 2-3 weeks, the 12V battery can drain completely, triggering warning lights including 'Charging System Malfunction', 'High Voltage Electrical System Malfunction', and 'All Wheel Drive Malfunction'. The car will not start, and if the frunk is locked, accessing the 12V battery becomes difficult. A software update (93P9 for Q6 models) has addressed some drain issues. The fix is straightforward: jump-starting via the under-hood terminals or replacing the 12V battery (€200-400 for the lithium-ion unit). Keeping a battery tender connected during extended storage is strongly recommended.

Multiple owners report intermittent 'Charging System: Fault' warnings that appear on the dashboard but do not actually prevent charging. In most cases, these are software glitches resolved by OTA updates or dealer software recalibration. However, some owners have experienced genuine failures where the car charges to 100% but the gear selector will not engage, or the car refuses to accept a charge entirely. In these cases, dealers have replaced the Charging Unit or the High-Voltage Battery Control Module (part of the SX6 switching unit, covered under the 8-year HV battery warranty). The 800V system is also sensitive to charger compatibility, with some 400V-only public chargers causing handshake failures. Genuine hardware failures requiring module replacement can cost €800-1,500 if out of warranty.

Audi Digital has acknowledged a problem with myAudi and the digital key for PPE-based vehicles, traced to the Audi Cloud infrastructure. Owners report being unable to see charge level or range, use remote charging or climate control, or set up the digital key (with 'Wallet is not responding' errors). In some cases, none of the keys (physical or digital) work, displaying 'Switch off the Ignition' errors. Workarounds include deleting and reinstalling the myAudi app, having the dealer re-add the user as a key user, and ensuring Mobile Data is enabled in the MMI. While functionally annoying, these issues rarely involve physical repair costs and are typically resolved by server-side fixes or software updates.

The A6 e-tron uses a CO2 refrigerant (R-744) heat pump for cabin heating and battery thermal management. Some Q6 e-tron owners have reported complete HVAC failures where the system blows only cold air regardless of settings, or alternates randomly between warm and cold. The specialized CO2 refrigerant creates a servicing challenge, as some dealers lack the equipment or gas supply to work on the system. Early reports suggest these are mostly control module or software glitches rather than mechanical failures, but if the heat pump compressor or expansion valve fails, replacement costs can reach €1,500-2,000 including refrigerant. This remains a low-probability risk on a car this new, but worth monitoring.

The optional adaptive air suspension uses air springs with electronically controlled damping. Audi air suspension systems across all models are known to develop leaks in the air springs, compressor wear, or valve block failures over time. On the A6 e-tron, which carries significant battery weight, the system works harder than on conventional models. Symptoms include one corner dropping overnight, slow ride height adjustment, or 'Air Suspension: Malfunction' warnings. Individual air spring replacement costs approximately €800-1,200 per corner, while compressor replacement runs €600-1,000. At this early stage in the car's life, failures are rare, but this is a known Audi weak point that typically manifests after 60,000-100,000 km.