2018 Audi A6 S Line TDI Ultra S-A 2.0L Heavy oil · YJZ 4

The 2.0 TDI Ultra diesel engine in this A6 is rated for competitive fuel economy in its class, typically returning around 55-65 mpg on a combined cycle depending on driving style, though real-world figures may be lower. As a Euro 6 diesel registered in 2018, road tax (VED) sits in a moderate band, though diesel vehicles are subject to higher first-year rates and the overall tax burden should be checked against current rates at point of purchase.

Insurance for an Audi A6 S Line typically places the vehicle in group 28-32, so expect mid-to-high premiums, particularly for younger drivers. Maintenance costs for an Audi of this specification are higher than for mainstream marques, with parts and labour at main dealers carrying a premium, though independent Audi specialists can offer significant savings. Common service items including brake fluid, oil changes, and filter replacements should be budgeted annually, with larger items such as timing belts and dual-mass flywheels representing notable occasional expenses.

The model aggregate data highlights the drive shaft joint as the most common MOT failure reason for the A6 range, so a thorough inspection of the drive shafts is essential. Listen for clicking noises when turning at low speed and check the CV boots for splits or grease leaks. Given that this particular vehicle has only one recorded MOT pass with no advisories, there is no specific defect pattern from its own history to guide inspection, which means extra diligence is required elsewhere.

Beyond the drive shafts, inspect the S Line sports suspension for worn dampers, springs, and anti-roll bar links, as these components tend to deteriorate earlier than on standard suspension variants. Check the alloy wheels for kerbing damage (common on S Line models), and inspect the tyres for even wear, which can indicate alignment or suspension issues. The 2.0 TDI engine should be started from cold during viewing — listen for excessive diesel rattle, check for smoke from the exhaust, and ensure no warning lights remain illuminated on the dashboard.

Finally, verify that all electrical features function correctly, including the MMI infotainment system, climate control, and any optional equipment such as heated seats or adaptive cruise control, as repairs to Audi's electronic systems can be costly. Examine the bodywork for any signs of accident repair, particularly around the front and rear bumpers which are common impact points, and check for consistent panel gaps.