Mercedes GLC 350d 2017 Review: 254 Hp V6 Diesel Performance

The 2017 Mercedes GLC 350d stands out as a compelling choice in the compact luxury SUV segment, offering a potent 3.0-liter V6 turbo diesel engine that delivers 254 horsepower and an impressive 620 Nm of torque from just 1,600 rpm. This powertrain propels the vehicle from 0-62 mph in 6.2 seconds, making it surprisingly brisk for its class while maintaining a refined character suited to long-distance cruising. Paired with a smooth nine-speed automatic transmission and standard all-wheel drive, it provides effortless acceleration and in-gear responsiveness without the frantic feel of some petrol alternatives.

Engine and Performance: A Diesel Masterclass

At the heart of the GLC 350d lies its 3.0-liter V6 turbo diesel, a unit that prioritizes smoothness and low-end grunt over outright outright speed. The engine’s massive torque figure ensures strong pull from low revs, ideal for overtaking on motorways or tackling inclines with ease. Real-world tests confirm its 47.9 mpg combined economy claim is achievable, especially on extended runs, though it trails the frugal four-cylinder 220d’s 56.5 mpg. The nine-speed gearbox shifts seamlessly, holding gears intelligently in auto mode and contributing to the composed driving experience.

Performance figures include a top speed around 140 mph, but the real appeal is the effortless nature of the power delivery. Weighing 1,890 kg, the SUV feels planted thanks to 4MATIC all-wheel drive, distributing power effectively for traction in varied conditions. Videos of loaded examples highlight over 1,000 km range on a full tank, underscoring its efficiency for family road trips.

This table compares key specs, showing the 350d’s balance of power and efficiency.

Driving Dynamics: Comfort Over Agility

Behind the wheel, the GLC 350d excels in refinement rather than sportiness. Its suspension soaks up road imperfections, gliding over potholes and providing a serene ride at highway speeds. Optional Airmatic air suspension further enhances this, adjusting firmness for different modes like Comfort, Sport, or Individual. Body roll is present in corners due to the tall stance, but the setup remains composed, prioritizing passenger comfort.

Steering is light yet weighted, offering decent feedback but lacking the sharpness of rivals like the Jaguar F-Pace. Multiple driving modes allow customization, with Sport tightening the throttle response and suspension. On twisty roads, it handles predictably but doesn’t invite aggressive driving. Long-term ownership reports after 30,000 miles praise its motorway prowess and minimal fatigue.

• Smooth ride quality ideal for daily commutes and highways.
• 4MATIC AWD ensures confident grip in wet or slippery conditions.
• Nine-speed auto delivers quick, unobtrusive shifts.
• Optional features like Distronic adaptive cruise and lane-keeping enhance safety.

Design and Build: Elegant Exterior

Mercedes’ signature styling graces the GLC 350d, with a bold grille, sleek LED headlights, and flowing lines that convey premium status. AMG Line packages add sportier bumpers, 20-inch alloys, and chrome accents, elevating its presence. The coupe variant, if chosen, introduces a sloping roofline for added style, though it slightly compromises rear headroom. Build quality is impeccable, with tight panel gaps and a solid feel throughout.

Interior Refinement: A Luxurious Haven

Step inside, and the cabin justifies the premium price. High-grade materials like soft leather, metal trims, and wood inlays create an upscale ambiance akin to larger Mercedes models. Seats are supportive with heating options, and the 40/20/40 split rear bench offers ample space for adults. The infotainment system, with its central screen, COMAND navigation, Bluetooth, and premium audio, is intuitive despite its dash-top placement.

Cargo capacity impresses at 550 liters with seats up (1,600 liters folded), matching the Audi Q5 while exceeding it slightly in max volume. A low load lip aids practicality, though the high floor requires some lifting effort. Features like panoramic sunroof, keyless entry, and ambient lighting enhance the experience.

• Spacious cabin for five passengers.
• 56.5 cubic feet max cargo with seats down.
• MB-Tex upholstery standard, with leather upgrades.
• Dual-zone climate and push-button start as norms.

Technology and Safety Suite

The 2017 GLC 350d brims with tech. Standard kit includes parking sensors, reversing camera, and collision warning. Optional packs add 360-degree cameras, blind-spot monitoring, active park assist, heads-up display, and Burmester sound. Driving aids like adaptive cruise and lane-keeping make it a leader in semi-autonomous features for the era.

Safety ratings are strong, with five-star Euro NCAP scores for the GLC line, bolstered by multiple airbags, stability control, and attention assist.

Practicality for Everyday Use

As a family SUV, it shines with generous rear legroom, ISOFIX points, and a versatile boot. Fuel stops are infrequent thanks to the 66-liter tank and efficient diesel. Servicing intervals suit high-mileage drivers, and resale values hold well for Mercedes diesels.

Rivals and Pricing Context

Priced higher than the 220d, the 350d competes with BMW X3, Audi Q5, and Volvo XC60. Its V6 refinement edges out four-cylinder rivals, but the price premium may deter budget buyers. In 2017, it started around £50,000, with options pushing it higher.

Ownership Verdict: Worth the Investment?

The GLC 350d excels for those seeking diesel torque, luxury, and efficiency. Drawbacks include numb steering and higher costs, but its smoothness and space make it a top pick. Opt for Airmatic and tech packs for the best experience.

Frequently Asked Questions (FAQs)

Is the 2017 GLC 350d reliable?

Yes, Mercedes diesels are durable; long-term tests show minimal issues post-30,000 miles.

How fuel-efficient is it really?

Expect 45-50 mpg on motorways, close to the 47.9 mpg claim.

What’s the boot space like?

550 liters seats up, expanding to 1,600 liters—highly practical.

Does it have Apple CarPlay?

Later 2017 models added it; check specs.

Is AWD standard?

Yes, 4MATIC is fitted across the range.