2026 Mercedes-Benz GLB: Everything to Know About Powertrains

Meta: Get the details on the 2026 Mercedes-Benz GLB powertrains, including engine options, performance, and efficiency in one quick guide

The Mercedes-Benz GLB continues to define the compact luxury SUV segment, combining cutting-edge powertrain technology, versatile performance capabilities, and refined engineering. The latest GLB offers an impressive lineup of engine options paired with advanced transmission technology to deliver a driving experience that balances power, efficiency, and sophistication.  

Powertrain Options for Every Driver

The GLB lineup presents a range of powertrains to suit different driving styles and preferences. The base GLB 250 4MATIC is equipped with a 2.0-litre turbocharged four-cylinder engine delivering 221 horsepower and 350 Nm of torque, offering a balanced blend of efficiency and power for daily driving. This refined powerplant features an integrated starter-generator that provides an additional boost of power when needed, enhancing acceleration while improving fuel economy.

For those seeking greater capability, the lineup includes the electrified GLB 250e 4MATIC plug-in hybrid, which combines a turbocharged engine with an electric motor. This sophisticated hybrid system delivers impressive combined output while providing the ability to drive on electric power alone for shorter commutes.

The performance-focused AMG GLB 35 4MATIC takes things further with a more powerful engine configuration that produces 302 horsepower and 400 Nm of torque, making it ideal for drivers who appreciate spirited driving without sacrificing the practicality of an SUV. The AMG variant features a specially tuned suspension and performance enhancements to match its increased power output.

Advanced Transmission Technology

8G-DCT Dual-Clutch Transmission

The heart of the drivetrain is the sophisticated 8G-DCT dual-clutch transmission. This 8-speed automatic transmission represents the pinnacle of Mercedes-Benz transmission technology, offering several advantages:

• Lightning-fast gear changes for responsive acceleration
• Dual-clutch design for seamless power delivery
• Multiple driving modes that adjust shift patterns based on driving conditions
• Paddle shifters for manual control when desired
• Optimized efficiency at highway speeds

The 8G-DCT transmission balances sporty performance with everyday drivability, delivering crisp gear changes during spirited driving while maintaining smoothness in daily commuting. The quick-shifting nature of this transmission enhances the responsive GLB character, making it feel more agile than its practical dimensions might suggest.

Intelligent Shift Logic

The GLB transmission incorporates advanced shift logic that adapts to your driving style. The system analyzes various inputs, including:

• Accelerator pedal position and movement patterns
• Vehicle speed and acceleration
• Road gradient
• Selected driving mode

This intelligent system learns your driving preferences over time and adjusts shift points to match your driving style. If you prefer spirited driving, it will hold gears longer and downshift more aggressively. For more relaxed cruising, it smoothly shifts up earlier to maximize efficiency and comfort.

4MATIC All-Wheel Drive System

Fully Variable Torque Distribution

All GLB models feature the renowned 4MATIC all-wheel drive system as standard equipment. This advanced system continuously monitors driving conditions and can instantly adjust power distribution between the front and rear axles. Unlike older AWD systems with fixed torque splits, the 4MATIC system in the GLB can vary torque distribution based on traction needs, ensuring optimal grip in all driving situations.

The fully variable torque distribution provides several benefits:

• Enhanced traction on slippery surfaces
• Improved handling in corners
• Better stability during evasive maneuvers
• Reduced understeer for more precise steering feel
• Seamless operation that requires no driver intervention

Off-Road Capability

While primarily designed for on-road performance, the 4MATIC system also provides the GLB with respectable off-road capability. The system works in conjunction with the electronic stability control and traction management systems to navigate challenging terrain with confidence. The GLB features an Off-Road Engineering Package that includes an additional "Off-Road" driving mode, which adapts the engine's power delivery, the transmission's shifting characteristics, and the intervention thresholds of the driving dynamics systems for optimal performance on unpaved roads.

Mild Hybrid Technology

EQ Boost System

The standard 2.0-litre engine in the GLB incorporates the Mercedes-Benz EQ Boost technology, which adds a 48-volt mild hybrid system to the powertrain. This system consists of:

• An integrated starter-generator (ISG) positioned between the engine and transmission
• A 48-volt electrical system that works alongside the conventional 12-volt system
• A small lithium-ion battery pack

The EQ Boost system provides several performance and efficiency benefits:

• Additional 20 horsepower and 180 Nm of torque during acceleration
• Virtually eliminating turbo lag by providing instant torque
• Enabling extended start-stop functionality for improved fuel economy
• Recovering energy during deceleration and braking
• Allowing the engine to shut off during coasting at highway speeds

This mild hybrid system significantly enhances the driving experience while improving efficiency, offering many of the benefits of electrification without the complexity or range concerns of a full electric vehicle.

Plug-in Hybrid Excellence

GLB 250e 4MATIC

The GLB 250e 4MATIC represents an important addition to the powertrain lineup, combining the 2.0-litre turbocharged engine with a powerful electric motor integrated into the transmission housing. This sophisticated plug-in hybrid system delivers impressive performance specifications:

• Combined system output of 218 horsepower and 450 Nm of torque
• Electric-only driving range of up to 70 kilometres
• Ability to drive at highway speeds using only electric power
• Rapid acceleration thanks to the instant torque of the electric motor
• Multiple driving modes to prioritize performance or efficiency

The 250e features a high-capacity lithium-ion battery pack under the rear floor, preserving the practical cargo space while delivering substantial electric driving capability. The battery can be recharged in approximately 3 hours using a Level 2 charger.

Performance Driving Dynamics

Dynamic Select System

The GLB features the Mercedes-Benz Dynamic Select system, which allows drivers to alter the vehicle's performance characteristics with the touch of a button. Each mode makes comprehensive adjustments to:

• Throttle response
• Transmission shift points
• Steering assistance level
• Suspension firmness (with available adaptive damping)
• Stability control thresholds

Available driving modes include:

• Eco: Optimizes for maximum efficiency
• Comfort: Provides a balanced, relaxed driving experience
• Sport: Sharpens responses for more engaged driving
• Sport+: Maximizes performance for spirited driving (AMG model)
• Individual: Allows customization of individual parameters
• Off-Road: Optimizes systems for unpaved surfaces (with Off-Road Engineering Package)

The Dynamic Select system transforms the driving experience, effectively giving you multiple vehicles in one depending on your mood or driving conditions.

Engineering Excellence

Engine Construction and Design

The engines powering the GLB represent the culmination of Mercedes-Benz engineering expertise. The standard 2.0-litre turbocharged engine features:

• Aluminum block and head construction for reduced weight
• Direct fuel injection with piezo injectors for precise fuel delivery
• Variable valve timing on both intake and exhaust camshafts
• Twin-scroll turbocharger for improved throttle response
• Nanoslide cylinder wall coating to reduce friction and improve durability

These technical features work together to deliver exceptional performance while maintaining impressive fuel efficiency for an engine of this output level.

AMG Performance Engineering

The AMG GLB 35 4MATIC features a specially enhanced version of the 2.0-litre turbocharged engine, with numerous upgrades to increase power and responsiveness:

• Reinforced engine block and crankcase
• Larger turbocharger with optimized airflow
• Enhanced cooling system for sustained performance
• AMG SPEEDSHIFT DCT 8G transmission with specific tuning
• AMG Performance 4MATIC with more rear-biased torque distribution

These enhancements transform the driving character of the GLB, providing genuine AMG performance credentials in a practical compact SUV package.

Efficiency Features

ECO Start/Stop System

The GLB includes an advanced ECO Start/Stop system that temporarily shuts down the engine when the vehicle comes to a stop, such as at traffic lights or in heavy traffic. The system restarts the engine instantly when the brake pedal is released or the accelerator is pressed. The integration with the 48-volt mild hybrid system makes this operation exceptionally smooth and nearly imperceptible to passengers.

Glide Mode

When coasting at highway speeds with your foot off the accelerator, the GLB can enter a glide mode that completely shuts off the engine in certain situations. The mild hybrid system ensures all vehicle systems continue to function normally, and the engine restarts instantly when power is needed. This feature further enhances fuel efficiency during highway driving.

Energy Recuperation

The GLB powertrain system includes sophisticated energy recuperation capabilities that convert kinetic energy into electrical energy during deceleration and braking. This recovered energy is stored in the 48-volt battery system and later used to support the engine during acceleration, reducing fuel consumption and emissions.

Powertrain Refinement

Noise and Vibration Control

Mercedes-Benz engineers have paid meticulous attention to minimizing noise, vibration, and harshness in the powertrain. This focus on refinement includes:

• Enhanced engine mounts that filter out vibrations
• Acoustic insulation throughout the engine compartment
• Precise balancing of rotating components
• Sound-absorbing materials strategically placed to minimize noise transmission
• Specially designed air intake and exhaust systems

These measures ensure that the GLB delivers the refined driving experience expected of a Mercedes-Benz, regardless of driving conditions or engine load.

2026 Mercedes-Benz GLB: Power and Luxury 

The Mercedes-Benz GLB continues to set the standard in the compact luxury SUV segment with its sophisticated powertrain options. From the efficient yet powerful base engine to the advanced plug-in hybrid and performance-focused AMG variants, the GLB offers a driving experience that combines the latest technology with the refined performance expected from the Mercedes-Benz brand. The integration of the 8G-DCT transmission, 4MATIC all-wheel drive, and intelligent driving systems ensures that the GLB delivers confident, responsive handling in all driving conditions while maintaining the versatility and practicality that have made it a success in its class.

Questions and Answers about the 2026 Mercedes-Benz GLB Powertrains

What type of fuel does the 2026 GLB 250 require?

• This luxury SUV is designed to run on premium unleaded fuel (91 octane or higher). While it can operate on regular unleaded fuel in a pinch, premium fuel is recommended to achieve the stated performance and efficiency specifications. The engine's advanced technology, including direct injection and turbocharging, is optimized for premium fuel.

How does the 4MATIC system in the GLB differ from all-wheel drive systems in other SUVs?

• The Mercedes-Benz 4MATIC system features fully variable torque distribution between front and rear axles, unlike many competitors that use fixed torque splits or reactive systems that engage only after wheel slip is detected. This allows it to proactively adjust power distribution based on driving conditions, enhancing both traction and handling without sacrificing efficiency.

What is the advantage of the EQ Boost mild hybrid system in the GLB?

• This system provides several advantages, including eliminating turbo lag by delivering instant torque at standstill, enabling a more refined start-stop system that operates more frequently and with less disruption, recovering energy during braking, and allowing the engine to shut down during coasting to improve fuel efficiency. It combines these benefits without the complexity of a full hybrid system.

Can the GLB 250e PHEV be driven in electric-only mode, and how far can it travel?

• Yes, it can be driven in electric-only mode by selecting the appropriate driving mode. When fully charged, it can travel up to 70 kilometres on electric power alone, making it suitable for daily commuting without using any fuel. The electric mode can be used at highway speeds, and the transition between electric and hybrid operation is seamless.

How does the AMG GLB 35 differ from the standard GLB in terms of performance?

• It features a significantly enhanced version of the 2.0-litre turbocharged engine, producing 302 horsepower compared to the standard 221 horsepower of the 250. It also includes a performance-tuned version of the 8G-DCT transmission with faster shift times, AMG-specific suspension tuning with available adaptive damping, more aggressive throttle mapping, and a more rear-biased 4MATIC system for sportier handling characteristics.

*Disclaimer: Content contained in this post is for informational purposes only and may include features and options from US or international models. Please contact the dealership for more information or to confirm vehicle, feature availability.*