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Mercedes Benz Gle Problems & Known Issues

The most common Mercedes Benz Gle problems ranked by severity — what to watch for, what it costs to fix, and what happens if you ignore it.

Generations

W166 — First Generation GLE
2015–2019
2.1 CDI, 3.0 CDI, 3.0 V6, 3.0 V6 Hybrid, 5.5 AMG V8
W167 — Second Generation GLE
2019–2024
2.0 CDI, 2.9 CDI, 3.0 V6, 3.0 V6 Hybrid

Top issues to watch for

The most serious Mercedes Benz Gle problems ranked by severity. We track 5 known issues — here are the ones you need to know about first.

Minor
Excessive brake pad wear (W166/W167)
W166, W1672015–20240k–100k miles
GLE models show accelerated brake pad wear compared to typical SUVs, with MOT data indicating pad wear 4-7x the fleet average across multiple engine variants. The issue affects both front and rear pads, with 5.5 AMG variants showing wear indicators at very low mileages. Heavy kerb weight (2.2-2.5 tonnes) and aggressive brake pad compounds contribute to rapid consumption. W167 generation shows similar patterns to W166.
What happens if ignoredWorn pads reduce braking efficiency and can damage expensive brake discs if metal backing plates contact the disc surface. Replacement brake discs cost £200-400 each. The heavy vehicle weight makes brake fade dangerous on steep descents with worn pads.
Independent garage
£180–£280
Specialist
£220–£350
Main dealer
£350–£500
Parts only
£80–£150
Minor
CV joint boot deterioration (W166)
W1662015–201920k–100k miles
W166 GLE models with diesel engines show premature CV joint boot failure at 4x the fleet average failure rate. The rubber boots protecting the constant velocity joints crack and split, allowing grease to escape and contamination to enter. This primarily affects the outer CV joints on the front driveshafts. The issue appears related to boot material quality rather than mechanical stress.
What happens if ignoredSplit boots allow grease to escape and water and dirt to contaminate the CV joint. Once contaminated, the joint will wear rapidly and require replacement within 10,000-20,000 miles. A complete driveshaft replacement costs significantly more than boot replacement alone.
Independent garage
£120–£200
Specialist
£150–£250
Main dealer
£250–£400
Parts only
£30–£60
Minor
Brake disc wear (W166/W167)
W166, W1672015–202440k–150k miles
GLE brake discs wear at nearly 3x the fleet average, particularly on higher-mileage examples. The combination of heavy kerb weight, aggressive pad compounds, and larger disc sizes leads to accelerated wear patterns. Front discs typically show scoring and thickness reduction, while rears may develop corrosion pitting from light use. The issue is consistent across both W166 and W167 generations.
What happens if ignoredWorn discs reduce braking performance and may not meet MOT standards for minimum thickness. Warped discs cause brake judder and uneven pad wear. Replacement costs are high due to disc size - front discs are typically 350mm+ diameter on GLE models.
Independent garage
£300–£500
Specialist
£400–£650
Main dealer
£600–£950
Parts only
£200–£400
Minor
Engine management light - emission system faults (W166/W167)
W166, W1672015–202420k–60k miles
Diesel GLE models show engine management light illumination at 1 and 3.0 diesel variants. The faults typically relate to diesel particulate filter (DPF) issues, NOx sensor failures, or EGR valve problems. US NHTSA data shows similar patterns with engine-related complaints. The issue appears to affect both generations similarly, often triggered by urban driving patterns.
What happens if ignoredPersistent engine management lights indicate emissions system faults that will cause MOT failure. DPF blockage can lead to expensive replacement (£1500-2500). EGR valve failure may cause poor fuel economy and increased emissions. Vehicle may enter limp mode restricting performance.
Independent garage
£200–£400
Specialist
£250–£500
Main dealer
£400–£800
Parts only
£100–£300

1 more known issues tracked

Including wear items, electrical niggles, and generation-specific problems. Check a specific car to see which issues apply to its age and mileage.

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MOT failure hotspots

Based on DVSA MOT test data. These are the items where the Mercedes Benz Gle fails at a significantly higher rate than the average car.

Window tint too dark
Wipers & Windscreen · 40-60k miles
MOT failure rate: 11x the fleet average
Sample: 5,559 tests
Any fracture or welding defect on a wheel
Wheels · 60-80k miles
MOT failure rate: 8.2x the fleet average
Sample: 4,181 tests
Brake lining or pad worn down to wear indicator
Brakes · 20-40k miles
MOT failure rate: 6.7x the fleet average
Sample: 21,156 tests
Reflector defective or damaged by up to 50% of ...
Lights & Electrics · 20-40k miles
MOT failure rate: 6.7x the fleet average
Sample: 6,199 tests
Tyre tread depth not in accordance with the req...
Tyres · 0-20k miles
MOT failure rate: 5.5x the fleet average
Sample: 2,132 tests
Brake lining or pad worn below 1.5mm
Brakes · 60-80k miles
MOT failure rate: 5.5x the fleet average
Sample: 4,409 tests

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Related

Mercedes Benz Gle reliability FAQs

What are the most common problems with the Mercedes Benz Gle?

The Mercedes Benz Gle has 5 known issues across 1 severity levels. The most common problems relate to general wear items.

Is the Mercedes Benz Gle reliable?

The Mercedes Benz Gle has 0 dangerous and 0 major known issues. No dangerous issues are tracked, which is a positive sign.

How much does it cost to fix Mercedes Benz Gle problems?

Repair costs range widely. The most significant issue (Excessive brake pad wear (W166/W167)) costs £180–£280 at an independent garage. Minor issues can be under £200. Always get a full inspection before buying.

Which Mercedes Benz Gle generation is most reliable?

The W166 (2015–2019) has the fewest dangerous issues (0). However, condition and service history matter more than generation — a well-maintained earlier car can be more reliable than a neglected newer one.