2018 Mercedes-Benz AMG GT S
The 2018 Mercedes-Benz AMG GT S is a high-performance sports car known for its stunning looks, powerful engine, and agile handling. The AMG GT S is equipped with a hand-built 4.0-liter twin-turbo V8 engine producing 515 horsepower and 494 lb-ft of torque. Other engine options for the 2018 AMG GT range include a standard AMG GT engine (469 hp) and a higher-output AMG GT C engine (550 hp), as well as the top-of-the-line AMG GT R engine (577 hp). All AMG GT models utilize a 7-speed dual-clutch automatic transmission. Owners generally praise the car’s performance, exhaust note, and luxurious interior, but some criticize its firm ride and limited practicality.
Engine
4.0L Twin-Turbo V8 (M178)
- Oil Leaks
- Description/Symptoms: Oil leaks can occur from various points on the engine, including valve cover gaskets, timing chain cover, and oil cooler lines. Symptoms include visible oil puddles under the car, the smell of burning oil, and low oil levels.
- Solution: Replacing the leaking gaskets or seals. For oil cooler lines, replacement of the lines is necessary.
- Estimated Cost to Fix: $200 - $2,000+, depending on the location and severity of the leak.
- Recalls: None Found
- Turbocharger Issues
- Description/Symptoms: Whining noises from the engine, loss of power, or turbo failure.
- Solution: Replacement of the faulty turbocharger.
- Estimated Cost to Fix: $3,000 - $6,000+
- Recalls: None Found
Transmission
7-Speed Dual-Clutch Automatic (AMG SPEEDSHIFT DCT 7G)
- Harsh Shifting/Jerking
- Description/Symptoms: Rough or jerky shifts, especially at low speeds. This can be due to software glitches or issues with the clutch packs.
- Solution: Software update or replacement of the clutch packs.
- Estimated Cost to Fix: $500 - $5,000+ depending on the cause and parts needed.
- Recalls: None Found
- Transmission Mount Failure
- Description/Symptoms: Excessive vibration from the drivetrain during acceleration and deceleration, a clunking sound when shifting gears.
- Solution: Replacing the transmission mount
- Estimated Cost to Fix: $300-$500
- Recalls: None Found
Suspension
- Air Suspension Issues (if equipped)
- Description/Symptoms: The AMG GT S has an adaptive suspension system that can encounter issues such as sagging, uneven ride height, or failure of the air compressor. Warning lights on the dash are also common.
- Solution: Replacing the affected air strut, air compressor, or associated components.
- Estimated Cost to Fix: $1,000 - $3,000+ per strut.
- Recalls: None Found
Electrical
- Infotainment System Glitches
- Description/Symptoms: Freezing, lagging, or unexpected reboots of the infotainment system.
- Solution: Software updates, or replacement of the head unit.
- Estimated Cost to Fix: $100 - $2,000+ depending on whether it’s a software or hardware issue.
- Recalls: None Found
- Sensor Malfunctions
- Description/Symptoms: Faulty readings from sensors throughout the vehicle. These can include O2 sensors, mass airflow (MAF) sensors, or wheel speed sensors. This can result in warning lights on the dashboard or poor performance.
- Solution: Replacement of the malfunctioning sensor.
- Estimated Cost to Fix: $200 - $500+ per sensor.
- Recalls: None Found
Exterior
- No Issues Found
Interior
- Seat Motor Failure
- Description/Symptoms: Malfunctioning or inoperative power seats.
- Solution: Replacing the seat motor or the entire seat assembly.
- Estimated Cost to Fix: $500-$2,000+
- Recalls: None Found
Summary
The 2018 Mercedes-Benz AMG GT S, while a desirable performance car, has some reported issues owners should be aware of. Engine oil leaks and turbocharger problems can be costly to address. Transmission issues, including harsh shifting and mount failures, are also a concern. Electrically, infotainment system glitches and sensor malfunctions are the most common issues. Suspension issues, specifically with the air suspension, can lead to significant repair bills. Overall, the potential for costly repairs should be considered when purchasing a used 2018 AMG GT S.