2017 Mercedes-Benz A45 AMG

The 2017 Mercedes-Benz A45 AMG is a high-performance hatchback known for its potent engine and sporty handling. It was only offered with one engine option, a 2.0-liter turbocharged inline-4 producing 375 horsepower and 350 lb-ft of torque. This engine was paired with a 7-speed dual-clutch automatic transmission. Owners generally praise its acceleration, handling, and overall fun factor, but some common complaints include a harsh ride, cramped rear seats, and relatively high running costs.

Engine

2.0L Turbocharged Inline-4 (M133)

• High-Pressure Fuel Pump Failure
  • Description/Symptoms: Engine misfires, rough idling, loss of power, check engine light illumination.
  • Solution: Replacement of the high-pressure fuel pump.
  • Estimated Cost to Fix: $800 - $1500+
  • Recalls: None Found
• Turbocharger Failure
  • Description/Symptoms: Whining noise from the turbocharger, loss of power, excessive smoke from the exhaust.
  • Solution: Turbocharger replacement.
  • Estimated Cost to Fix: $2500 - $4000+
  • Recalls: None Found
• Coolant Leaks
  • Description/Symptoms: Low coolant level, overheating, visible coolant leaks.
  • Solution: Locate and repair or replace the faulty hose, gasket, or component.
  • Estimated Cost to Fix: $200-$1000+ (depending on location)
  • Recalls: None Found

Transmission

7-Speed Dual-Clutch Automatic (AMG Speedshift DCT 7)

• Harsh Shifting
  • Description/Symptoms: Jerky or abrupt shifts, especially during low-speed driving.
  • Solution: Transmission software update, adaptation reset, or in severe cases, clutch replacement.
  • Estimated Cost to Fix: $100 - $200+ for software/adaptation, $2000 - $4000+ for clutch replacement.
  • Recalls: None Found
• Mechatronic Unit Failure
  • Description/Symptoms: Erratic shifting, failure to engage gears, transmission malfunction warning.
  • Solution: Replacement of the mechatronic unit.
  • Estimated Cost to Fix: $2500 - $4500+
  • Recalls: None Found

Suspension

• Damper Failure (Especially on models with Adaptive Suspension)
  • Description/Symptoms: Excessive bouncing, poor handling, uneven tire wear.
  • Solution: Damper replacement.
  • Estimated Cost to Fix: $500 - $1500+ per damper, depending on location and OEM vs. aftermarket.
  • Recalls: None Found

Electrical

• Battery Drain
  • Description/Symptoms: Car struggles to start, dead battery after short periods of inactivity.
  • Solution: Diagnose and repair parasitic drain (e.g., faulty module, wiring issue) or replace battery.
  • Estimated Cost to Fix: $150 - $800+ depending on the source of the drain
  • Recalls: None Found
• Infotainment System Issues
  • Description/Symptoms: Freezing, Crashing, not responding, glitchy display.
  • Solution: Software update, replacement of the head unit in severe cases.
  • Estimated Cost to Fix: $0 - $200+ for software, $500 - $2000+ for replacement.
  • Recalls: None Found

Exterior

• No Issues Found

Interior

• Sunroof Issues
  • Description/Symptoms: Sunroof not opening or closing properly, getting stuck, making noise.
  • Solution: Lubricate the tracks, repair or replace the motor or mechanism.
  • Estimated Cost to Fix: $100-$800+
  • Recalls: None Found

Summary

The 2017 Mercedes-Benz A45 AMG, while a thrilling performance vehicle, can suffer from a range of issues. The most significant potential problems revolve around the engine and transmission, with potential high costs associated with turbocharger, fuel pump, and mechatronic unit failures. Electrical gremlins, particularly battery drain and infotainment issues, are also relatively common. Suspension issues can arise as well, especially with the adaptive dampers. While not every A45 AMG will experience these issues, it’s crucial to be aware of them when considering purchasing one, as the repair costs can be substantial.