2017 MERCEDES-BENZ GLS 3.0 Gls350d V6 Amg Line

Looking for a luxurious and spacious SUV that can handle family adventures and executive transport with equal aplomb? A used Mercedes-Benz GLS is a superb choice. This full-size luxury SUV, often dubbed the "S-Class of SUVs," offers unparalleled comfort, sophisticated technology, and powerful performance, all wrapped in the iconic Mercedes-Benz package. At CarsLink, we help you navigate the UK market to find the perfect pre-owned GLS to suit your needs and budget.

Why Buy a Used Mercedes-Benz GLS?

The Mercedes-Benz GLS consistently ranks among the top large luxury SUVs. When you opt for a used model, you gain access to this exceptional level of refinement at a significantly more accessible price point. You're investing in a vehicle that offers:

• Generous Space: With seating for up to seven adults across three rows, the GLS is ideal for larger families or for those who simply appreciate extra room. The third row is surprisingly accommodating, even for adults on shorter journeys.
• Supreme Comfort: Expect a first-class cabin experience with premium materials, advanced climate control, and a ride quality that smooths out even the roughest UK roads.
• Cutting-Edge Technology: Previous generations of the GLS have featured advanced infotainment systems, driver assistance aids, and connectivity features that have often led the industry.
• Powerful Performance: GLS models are typically equipped with potent V6 or V8 engines, providing effortless acceleration and impressive towing capability.

Popular Mercedes-Benz GLS Models and Variants

Over its generations, the GLS has seen various iterations, with specific trims and engine options being particularly sought after on the used market in the UK.

Generation	Model Designations	Key Features
X166 (2015-2019)	GLS 350 d, GLS 500, GLS 63 AMG	Facelifted GL-Class, refined styling, improved tech, diesel and V8 options.
X167 (2019-Present)	GLS 350 d, GLS 400 d, GLS 450, GLS 580, GLS 63 AMG	All-new design, MBUX infotainment system, enhanced safety features, mild-hybrid options.

The 'd' models, particularly the diesel variants like the GLS 350 d and 400 d, are exceptionally popular for their balance of performance and fuel efficiency, making them well-suited for UK driving conditions.

Typical Used Mercedes-Benz GLS Prices in the UK (2025-2026 Estimates)

Prices for used Mercedes-Benz GLS models vary significantly based on age, mileage, condition, and specification. Here are some approximate ranges you might expect for models available in the UK market in late 2025 and early 2026:

• Pre-facelift X166 (e.g., 2016-2018): £25,000 - £45,000
• Late X166 (e.g., 2018-2019): £35,000 - £55,000
• Early X167 (e.g., 2019-2021): £50,000 - £75,000
• Later X167 (e.g., 2022 onwards): £65,000+
• AMG Variants (GLS 63): These will command a significant premium, often starting from £50,000 for older models and upwards of £90,000 for newer ones.

Always check current listings for the most accurate pricing.

What to Look for When Buying a Used Mercedes-Benz GLS

When inspecting a used GLS, pay close attention to the following:

• Service History: A full Mercedes-Benz or reputable specialist service history is crucial, especially for diesel models and higher-performance variants.
• Bodywork and Interior: Check for dents, scratches, and uneven panel gaps. Inside, inspect the upholstery for wear and tear, and ensure all electronic features, including the infotainment system and panoramic sunroof (if fitted), are working correctly.
• Tyres and Brakes: Given the GLS's size and weight, ensure the tyres have plenty of tread and the brakes are in good condition.
• Engine and Drivetrain: Listen for any unusual noises from the engine or transmission. Check for smooth gear changes and responsive power delivery.
• Electrics: Test all electric functions, including windows, seats, air conditioning, and the advanced driver assistance systems.

Running Costs for a Used Mercedes-Benz GLS

As a large luxury SUV, the GLS is not the most economical vehicle to run in the UK. Consider these factors:

• Fuel: Diesel models (GLS 350 d, 400 d) offer better fuel economy, often returning in the mid-30s mpg on a combined cycle. Petrol V8 models will be significantly thirstier.
• Road Tax: Vehicle Excise Duty (VED) is based on CO2 emissions and the vehicle's list price when new. Newer models may fall under the higher rate band for a period.
• Insurance: Group 40-50+ insurance ratings are common, reflecting the vehicle's value and performance. Get quotes specific to your circumstances.
• Servicing and Maintenance: Official Mercedes-Benz servicing can be expensive. Independent Mercedes specialists can offer more cost-effective solutions. Parts for these vehicles can also be costly.

Common Issues with Used Mercedes-Benz GLS Models

While generally reliable, some common points to be aware of with used GLS models include:

• Air Suspension: The Airmatic suspension is a source of comfort but can be expensive to repair if components fail. Check for any sagging or warning lights.
• Infotainment System Glitches: Particularly on earlier generation X166 models, some users have reported occasional issues with the COMAND system.
• Diesel Particulate Filter (DPF): Like all modern diesels, ensure the DPF hasn't been clogged due to a lack of long journeys. Regular maintenance is key.
• AdBlue System (Diesel Models): Ensure the AdBlue system is functioning correctly, as faults can be costly to rectify.

Choosing a well-maintained example from a reputable seller, as found on CarsLink, will significantly minimise the risk of encountering these issues.