Most Common Car Issues

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Model
GLS-Class
Model Year
2018

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MOST COMMON PROBLEMS

MERCEDES-BENZ GLS-Class 2018

The 2018 Mercedes-Benz AMG GLS 63 is a high-performance, luxury SUV with a powerful 5.5L V8 engine producing 577 hp. It features advanced safety systems like Dynamic Brake Support, Forward Collision Warning, and Pedestrian Automatic Emergency Braking. With seating for 7 and a host of standard technologies including Adaptive Cruise Control and Blind Spot Warning, this all-wheel-drive vehicle offers both comfort and security. Priced from $125,300, it combines luxury with practicality.

Spec:

Dynamic Brake Support (DBS)
Standard
Engine Brake (hp) From
577
Engine Configuration
V-Shaped
Engine Manufacturer
Daimler
Engine Model
M157
Engine Number of Cylinders
8
Engine Stroke Cycles
4

Problems:

Faulty turbocharger
The M157 engine is known to experience turbocharger issues, which can lead to reduced engine performance and increased exhaust smoke.
Oil leaks
This engine model has been reported to have oil leaks, particularly from the valve cover gaskets and oil pan.
Carbon build-up
Direct injection engines like the M157 can suffer from carbon build-up on the intake valves, leading to misfires and rough idling.
Timing chain wear
Over time, the timing chain can stretch or wear out, causing rattling noises and potential engine damage if not addressed.
Cooling system problems
Issues with the water pump or radiator can lead to overheating, especially in high-performance engines like the M157.
Faulty ignition coils
Ignition coil failure can cause misfires, poor fuel economy, and reduced engine power.
Fuel injector problems
Faulty fuel injectors can lead to poor combustion, rough running, and increased emissions.
Transmission issues
Though not directly an engine problem, the transmission in the GLS-Class can sometimes experience shifting issues, which can affect overall vehicle performance.
MERCEDES-BENZ GLS-Class 2018

The 2018 Mercedes-Benz AMG GLS 63 is a high-performance multipurpose passenger vehicle (MPV) with a V8 engine, 577 hp, and a top speed of 168 mph. It features advanced safety systems such as Dynamic Brake Support, Forward Collision Warning, and Pedestrian Automatic Emergency Braking. With seating for 7 across 3 rows, the vehicle also includes luxury amenities like Adaptive Cruise Control, Blind Spot Warning, and a Backup Camera. Priced at $125,300, it combines power and elegance, making it a standout in its class.

Spec:

Dynamic Brake Support (DBS)
Standard
Engine Brake (hp) From
577
Engine Configuration
V-Shaped
Engine Manufacturer
Daimler
Engine Model
M157
Engine Number of Cylinders
8
Engine Stroke Cycles
4

Problems:

Faulty turbocharger
The M157 engine is known to experience turbocharger issues, which can lead to reduced engine performance and increased exhaust smoke.
Oil leaks
This engine model has been reported to have oil leaks, particularly from the valve cover gaskets and oil pan.
Carbon build-up
Direct injection engines like the M157 can suffer from carbon build-up on the intake valves, leading to misfires and rough idling.
Timing chain wear
Over time, the timing chain can stretch or wear out, causing rattling noises and potential engine damage if not addressed.
Cooling system problems
Issues with the water pump or radiator can lead to overheating, especially in high-performance engines like the M157.
Faulty ignition coils
Ignition coil failure can cause misfires, poor fuel economy, and reduced engine power.
Fuel injector problems
Faulty fuel injectors can lead to poor combustion, rough running, and increased emissions.
Transmission issues
Though not directly an engine problem, the transmission in the GLS-Class can sometimes experience shifting issues, which can affect overall vehicle performance.
MERCEDES-BENZ GLS-Class 2018

The 2018 Mercedes-Benz GLS550-4M is a luxurious 7-seater MPV equipped with a powerful 4.7L V8 engine delivering 429 hp. It offers advanced safety features such as Dynamic Brake Support, blind spot warning, and multiple airbags across all three rows. Standard amenities include adaptive driving beam headlights, a backup camera, and parking assist. This all-wheel-drive vehicle is built for performance and comfort, making it a premium choice for families.

Spec:

Dynamic Brake Support (DBS)
Standard
Engine Brake (hp) From
429
Engine Configuration
V-Shaped
Engine Manufacturer
Daimler
Engine Model
M278
Engine Number of Cylinders
8
Engine Stroke Cycles
4

Problems:

Oil leaks
The Mercedes-Benz M278 engine is known for oil leaks, often from the timing chain cover or valve cover gaskets. This can lead to oil loss and potential engine damage if not addressed.
Timing chain issues
The M278 engine can suffer from timing chain stretch or wear over time, leading to poor engine performance or even engine failure if the chain skips teeth or breaks.
Turbocharger problems
The twin-turbo setup on the M278 engine can sometimes lead to turbocharger failures or issues such as oil leaks and reduced performance due to worn-out turbo components.
Carbon build-up
Direct injection engines like the M278 are prone to carbon build-up on intake valves, which can cause rough idling, misfires, and reduced engine efficiency.
Coolant leaks
The engine may develop coolant leaks from components such as the water pump or radiator, leading to overheating issues if not properly maintained.
Ignition coil failures
The M278 engine may experience ignition coil failures, leading to misfires and reduced engine performance.
Serpentine belt wear
The serpentine belt on the M278 engine can wear out over time, leading to potential belt failure and loss of accessory functions such as the alternator and power steering.
Pcv system issues
Problems with the Positive Crankcase Ventilation (PCV) system can lead to oil consumption and potential engine performance issues.
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