Mercedes GLS Vs Audi Q7: Space, Performance, Cost

Luxury full-size SUVs like the Mercedes GLS and Audi Q7 offer premium comfort, advanced technology, and versatile seating for up to seven passengers. These vehicles cater to families needing ample space or executives seeking opulent rides. The GLS emphasizes grandeur with its larger footprint, while the Q7 prioritizes refined handling and efficiency. This comparison draws from detailed specs and tests to highlight strengths in design, powertrains, interiors, and ownership costs.

Design and Dimensions: Size Matters in Luxury Haulers

Exterior styling sets the tone for these behemoths. The Mercedes GLS boasts a bolder, more imposing presence with its extended wheelbase and heightened stance, measuring approximately 5,162mm in length and 1,850mm in height. This design conveys S-Class-like prestige on stilts, ideal for those wanting a statement vehicle. In contrast, the Audi Q7 appears sleeker at 5,052mm long and 1,740mm tall, with sharper lines and a sportier profile that blends elegance with athleticism.

Wheelbase differences impact ride quality: the GLS’s 3,075mm span provides superior stability on highways, while the Q7’s 2,994mm setup enhances maneuverability in urban settings. Both share a 12.4-meter turning circle, making parking surprisingly feasible for their size. Width is comparable at around 1,968-1,982mm, ensuring they fit standard lanes comfortably.

These proportions mean the GLS feels more planted during long cruises, but the Q7’s compact form aids daily drivability.

Powertrains and Performance: Torque Titans Compared

Both models feature robust V6 diesel engines in tested variants, delivering ample low-end grunt for towing up to 3,500kg. The Audi Q7’s 2,967cc unit produces 268bhp at 3,250rpm and 600Nm from 1,500rpm, paired with an eight-speed automatic and quattro all-wheel drive. It accelerates from 0-60mph in 6.3 seconds, with flexible in-gear responses like 30-50mph in 2.8 seconds in third.

The Mercedes GLS counters with a 2,987cc V6 offering 255bhp at 3,400rpm and a class-leading 620Nm from 1,600rpm. Its nine-speed transmission and 4Matic system yield 0-60mph in 7.8 seconds, but it shines in higher gears, hitting 50-70mph quicker in eighth. Top speeds are limited to 145mph for Q7 and 138mph for GLS.

Braking prowess is close: Q7 stops from 70mph in 48.6m, GLS in 48.0m, both excelling from lower speeds. The GLS’s heavier 2,455kg kerb weight (vs Q7’s 2,060kg) demands more effort, yet air suspension smooths the ride.

• Q7 Advantage: Quicker outright acceleration and lighter feel for spirited drives.
• GLS Advantage: Superior mid-range pull and refined nine-speed shifts.

Fuel Efficiency and Running Costs: Balancing Luxury with Economy

Efficiency favors the lighter Q7, achieving 31.4mpg in tests (518-mile range from 75L tank) versus GLS’s 26.7mpg (587 miles from 100L tank). Official figures show Q7 at 47.9mpg combined, GLS at 37.2mpg. Real-world urban driving sees Q7 at 20mpg city/26mpg highway, GLS at 19/24mpg. CO2 outputs reflect this: Q7 around 153-241g/km, GLS 199-284g/km.

Pricing starts higher for GLS at £69,110 on-road versus Q7’s £53,840, with three-year residuals stronger for GLS at 45% (£31,100) over Q7’s 44.5% (£23,959). Annual taxes hit GLS harder: £5,073 standard rate vs £3,216 for Q7. Payload is similar (795-880kg), but GLS’s mass impacts insurance and fuel bills long-term.

Interior Comfort and Practicality: Space for Seven

Cargo versatility is key. Q7 offers 295L with seven seats, expanding to 770L (five seats) and 1,955L (two seats). GLS matches 295L initially but provides 680L mid-row and 2,300L max, edging ahead for bulky loads. Both handle third-row duties, though Q7’s extra front legroom (41.7in vs 40.3in) suits tall drivers, while GLS offers more second-row space (41.9in vs 38.8in).

Premium cabins define luxury. Q7 includes standard leather, four-zone climate, and optional regenerative braking. GLS ups the ante with nine airbags standard, full leather, heated seats, and air suspension as default. Tech like 360 cameras and adaptive cruise are available on both, but GLS integrates them seamlessly.

Noise isolation favors Q7: 68dB at 70mph vs GLS’s 62dB outside, but interiors are hushed.

Safety and Driver Assistance: Protection Priorities

Both earn top safety marks with standard automatic emergency braking. Q7 adds optional start/stop and regenerative systems; GLS mandates them. Airbags number six in Q7, nine in GLS. Parking sensors and Isofix are universal, with 360 cameras optional on Q7 (£1,150) and standard on GLS. Adaptive cruise and air suspension enhance highway safety.

Ownership Verdict: Which SUV Wins?

The Audi Q7 excels for buyers prioritizing agility, efficiency, and value, suiting frequent urban use. Mercedes GLS triumphs in outright luxury, space, and long-haul refinement, perfect for those valuing presence and comfort. Test drive both to match your lifestyle.

Frequently Asked Questions

Which has better fuel economy: GLS or Q7?

Audi Q7 leads with 20 city/26 highway mpg versus GLS’s 19/24 mpg.

Is the GLS more spacious inside?

GLS offers more cargo (up to 2,300L) and second-row legroom; Q7 has superior front space.

What are the starting prices?

Q7 around $65,800 MSRP, GLS higher at equivalent £69k on-road.

Which tows more?

Both handle 3,500kg braked.

Are they reliable?

Both score well, but consult owner reports for latest data.