Driving the Mercedes-Benz GLS 450d SUV from Mumbai to Pune via the expressway offers a remarkably smooth and comfortable experience, akin to travelling in a private jet. The vehicle’s robust diesel engine provides ample power for inclines, while the plush seating and signature Mercedes refinement contribute to a relaxing journey. The SUV’s inherent capability to cover long distances effortlessly is a key highlight.
The Pune Expressway: A Testament to GLS Comfort
The journey commenced seamlessly, particularly when departing after an early lunch on a Sunday, avoiding traffic congestion. The GLS quickly covered ground on the freeway and the expansive Atal Setu, a 21-kilometre-long bridge. Cruising at higher speeds with the large diesel engine operating at low RPMs proved to be a thoroughly enjoyable experience. The OM656, a straight-six diesel engine, is noted for its smooth operation and willingness to rev. It is complemented by a 48-volt mild-hybrid system that integrates discreetly into the driving dynamics.
Engine Performance and Mild-Hybrid Integration
While the engine may not exhibit the same immediate responsiveness as its predecessor, the V6 diesel, due to evolving emissions standards, its power delivery feels more progressive. The increased smoothness and creamy torque are significant advantages, making the driving experience more refined. This evolution in engine tuning prioritizes comfort and efficiency without compromising on the GLS’s substantial performance capabilities.
Navigating Diversions and Imperfect Roads
A detour to the Nanoli stud farm and a new racetrack presented an unexpected challenge for the GLS. The SUV did not perform as anticipated on poorly maintained roads. Significant ruts and deep potholes caused noticeable jostling, and the rear suspension exhibited more lateral movement than expected. Despite its substantial size, measuring over 5.2 metres in length, the GLS feels surprisingly manageable, largely due to its exceptionally well-calibrated steering system. The quick and precise steering allows for confident control, giving the driver a strong sense of command over the vehicle.
Steering Dynamics and Handling
The steering setup is a standout feature, providing a direct and engaging connection between the driver and the road. It instills confidence, allowing for precise manoeuvring even in tighter situations. This dynamic capability helps mitigate the challenges posed by less-than-ideal road surfaces, contributing to an overall sense of control.
Rear Seat Experience: A Realm of Luxury
The return journey from Pune offered a chance to experience the GLS from the rear seat. The ample legroom, generously sized seats, and excellent outward visibility create a superior environment for passengers. The cabin’s opulent ambiance is further enhanced by the quality of materials and craftsmanship. The presence of three screens in the rear is noteworthy, but the enduring appeal of traditional Mercedes-Benz build quality is perhaps even more significant.
Cabin Ambiance and Comfort Features
The rear cabin maintains the characteristic Mercedes-Benz quietness, effectively minimizing diesel engine noise. Comfort is paramount, with features like plush headrest pillows adding a touch of indulgence. The folded-down centre armrest and reclining backrest in a three-passenger configuration allow for significant relaxation, making long journeys particularly pleasant. The quality of the interior materials and the solid feel of the cabin are indicative of Mercedes-Benz’s commitment to luxury.
Reflections on the Driving Experience
During the journey back, the author dozed off in the rear, only to wake up upon reaching the Atal Setu. This brief nap underscores the effectiveness of the cabin’s sound insulation and comfortable seating. The experience highlights the GLS’s dual nature: a capable driver’s vehicle and a supremely comfortable mobile lounge, particularly for rear-seat occupants.
Practical Considerations and Minor Issues
While the GLS excels in most aspects, a minor inconvenience was noted with the running board, which can be slippery and protrude enough to cause minor injuries. This is a small detractor from an otherwise flawless user experience.
Test Data and Ownership Insights
The Mercedes-Benz GLS 450d AMG Line, as observed in the test data, has completed 19,200 km. Priced at Rs 1.34 crore (ex-showroom, India), its fuel economy on the highway is rated at 12.1 kmpl. Importantly, there have been no reported faults or maintenance costs during this period, suggesting strong reliability and build quality. The data from the January 2026 report indicates a consistent and positive ownership experience.
Key Specifications and Performance Metrics
The GLS 450d features a powerful diesel engine known for its smooth torque delivery. The integration of the mild-hybrid system enhances efficiency and responsiveness. The SUV’s long wheelbase contributes to its stable ride, while the advanced suspension system aims to balance comfort and dynamic handling. The quoted fuel economy figure of 12.1 kmpl on the highway is competitive for a vehicle of its size and capability.
Overall, the Mercedes-Benz GLS 450d continues to set a benchmark for luxury SUVs in India. Its blend of performance, comfort, and advanced technology makes it a compelling choice for discerning buyers. The vehicle’s ability to traverse diverse road conditions, from smooth expressways to more challenging surfaces, while maintaining a high level of passenger comfort, is a testament to its sophisticated engineering.
