2027 Mercedes-Benz GLC 400 Buyer's Guide: Battery, Dimensions, and Features Explained

The 2027 Mercedes-Benz GLC 400 4MATIC Electric is set to arrive in the second half of 2026, and for buyers who have been waiting for an electric SUV that covers every base — long range, fast charging, generous cargo room, and a technology suite built around daily use — this model deserves a close look. Built on a new all-electric architecture and powered by the AI-driven MB.OS operating system, the GLC 400 4MATIC Electric is a purpose-built battery-electric vehicle, not a conversion of an existing platform.

This guide covers the three areas that matter most to buyers at the decision stage: the battery and charging system, the interior dimensions and cargo space, and the key features that define the ownership experience. Every figure here comes directly from Mercedes-Benz press documentation so you can evaluate this vehicle with confidence.

Battery and Charging: The Numbers That Define Daily Range

The GLC 400 4MATIC Electric will carry a 94 kWh usable lithium-ion battery built on 800-volt architecture. The battery cells use anodes where silicon oxide is mixed with graphite, achieving a volumetric energy density of 680 Wh/l — a chemistry that supports both high energy storage and efficient charge acceptance.

The 800-volt system enables DC fast charging up to 330 kW. For context on what that means in practice: up to 305 km of WLTP range can be recharged in 10 minutes. A standard DC converter also allows charging at 400-volt DC stations, giving the GLC 400 access to a wider range of public charging infrastructure without any additional hardware.

Total WLTP range is rated at up to 715 km, which places this vehicle firmly in long-distance territory. The on-board Navigation with Electric Intelligence plans routes that include charging stops automatically, accounting for topography, weather, speed, and energy demand — and the system can reserve a charging spot at select Mercedes-Benz charging hubs 15 minutes before arrival.

Battery and Charging at a Glance

The battery is also designed with service access in mind. The electronics and electrical unit can be accessed and replaced from below without disassembling the entire battery. The battery cover is fastened with screws, not adhesive, keeping the system modular and field-serviceable over the vehicle's lifespan.

Dimensions: Where the Electric GLC Gains Over Its Predecessor

The all-electric GLC 400 4MATIC is built on a dedicated electric platform with a longer wheelbase than the combustion-engine GLC — 2,972 mm, compared to the previous 2,893 mm. That 79 mm gain translates into measurable improvements in passenger space front and rear.

Front-row occupants gain 13 mm of legroom and 46 mm of headroom. Rear passengers gain 48 mm of legroom and 15 mm of headroom. These are not rounding-error differences — rear legroom in particular sees a meaningful increase that buyers travelling with adults in the back seat will notice.

Cargo capacity also increases. The boot offers 569 litres with the rear seats up, expanding to 1,739 litres when the 40:20:40 rear seatbacks are folded flat. A front trunk (frunk) adds 127 litres of additional storage, accessible via a touch-controlled partial electric opening. The frunk lid unlocks with a tap of the Mercedes-Benz star.

Interior Space Summary

• Wheelbase: 2,972 mm (+79 mm vs. ICE GLC)
• Rear legroom gain: +48 mm
• Boot capacity: 569 L / 1,739 L (seats folded)
• Frunk: 127 L

For buyers considering towing, the GLC 400 4MATIC Electric is rated to tow up to 5,291 lbs (2,400 kg) braked when equipped with the optional trailer hitch. ESP trailer stabilization is standard with the hitch, and optional Trailer Maneuvering Assist handles steering control automatically when reversing at speeds up to 6 km/h.

Features Buyers Will Use Every Day

Drive System and Performance

The GLC 400 4MATIC uses a permanently excited synchronous motor (PSM) at the rear, developed entirely in-house by Mercedes-Benz. A two-speed transmission on the rear axle — first gear at 11:1 ratio for acceleration and low-speed efficiency, second gear at 5:1 for highway cruising — keeps the drivetrain operating in its most efficient range at all times. A front disconnect unit engages the second motor on demand for 4MATIC all-wheel drive. Peak output stands at 483 hp. Electronically limited top speed is 210 km/h. Battery-to-wheel efficiency over long distances reaches 93 percent.

Chassis and Ride Quality

Standard suspension uses a four-link front axle and multi-link rear. The optional Agility & Comfort Package upgrades this to AIRMATIC air suspension with intelligent suspension control — the same technology found in the S-Class — combined with rear-axle steering. At low speeds, the rear wheels can steer up to 4.5 degrees opposite to the front wheels, effectively shortening the wheelbase for a tighter turning circle. At higher speeds, they steer up to 2.5 degrees in the same direction, improving lane-change stability. With this package, the GLC's turning circle is reduced by 900 mm, to approximately 11.2 m.

The One-Box braking system manages both regenerative braking and conventional hydraulic braking from a single integrated module. Recuperation power reaches up to 300 kW, and in maximum recuperation mode (D-), the vehicle decelerates at up to 3 m/s² — enough to bring the car to a full stop without touching the hydraulic brakes in over 99 percent of braking events. Drivers can select four recuperation levels: D- (maximum), D (standard), D+ (none), and D Auto (intelligent, adjusts automatically).

Technology

The GLC 400 4MATIC Electric runs on the MB.OS operating system, which manages infotainment, driver assistance, charging, and comfort features from a unified architecture. The fourth-generation MBUX infotainment system includes the MBUX Virtual Assistant, which uses a Multi Agent Approach — drawing simultaneously on ChatGPT 4o, Microsoft Bing, and Google Gemini depending on the type of query. Navigation is powered by Google Maps with an integrated Google Cloud Automotive AI Agent.

The optional MBUX Hyperscreen spans 39.1 inches across the full width of the instrument panel and is the largest continuous screen in any Mercedes-Benz to date. Standard equipment includes an eight-camera, five-radar-sensor, twelve-ultrasonic-sensor configuration connected to a high-performance control unit running MB.OS. The optional DIGITAL LIGHT headlamps use micro-LED technology and produce a high-resolution illumination field approximately 40 percent larger than the previous generation, while consuming roughly 50 percent less energy.

Additional standard safety features include PRE-SAFE preventive occupant protection and a centre airbag. TERRAIN MODE is available for gravel and dirt driving, with the "transparent hood" function providing a virtual view beneath the front of the vehicle via the central display.

Key Features Summary

Explore the 2027 GLC 400 4MATIC Electric at Mercedes-Benz Laval

The 2027 GLC 400 4MATIC Electric is set to arrive in the second half of 2026. For buyers who want to understand exactly what they are getting — battery size, interior space, or the full list of standard and optional technology — the team at Mercedes-Benz Laval is the right place to start. Visit the dealership in Laval to get detailed specifications, explore configuration options, and arrange a test drive ahead of the model's arrival.