Ranked #135 car in the UK · SUV · 3,297 units sold last year
The Mercedes GLB (2020 on) is the boxy, practical compact SUV - notable for offering seven seats in a small footprint, a rarity in the premium class. UK cars are petrol, diesel and a GLB250e plug-in hybrid. Its upright shape maximises space and headroom, making it the sensible, family-friendly choice among Mercedes' smaller SUVs - more van-of-the-people practical than its swoopier GLA and GLC siblings.
How these figures are sourced — the valuation is anchored to a researched used-market price for this model (AutoTrader median, 2023 at 30k miles). Reliability, mileage and variant data are real DVSA MOT records. Dimensions, tyre sizes and costs, servicing figures and the insurance group are segment-level estimates rather than sourced per car, and are being replaced model by model.
combined
The short version
Forecourt score
Value 56 · Reliability 67 · catalogue percentiles
The Mercedes-Benz GLB holds its value about averagely and costs about average to run. Its MOT-based reliability is excellent — an MOT score of 81/100, ahead of 85% of the cars we track. On three-year value retention it ranks better than 56% of models.
The Forecourt score blends how this car ranks against the catalogue on value retention, reliability and insurance cost (weighted 40/40/20) — the from-new ownership picture. Higher is better; running cost is not yet folded in.
Fuel
Petrol · 1332cc
Power
163 ps
Drivetrain
FWD
Cam drive
Chain
Quoted MPG
41 mpg
The volume GLB. 1.3L turbo, 163 PS, 7-speed DCT, FWD. 9.1s 0-62. 41+ mpg achievable. 7-seat standard. AMG Line — 18-inch wheels, leather. Rare premium compact 7-seater.
Tidy and well looked-after for its age — the typical car.
Remembered as you browse other cars.
Optional — fills in the exact year and ULEZ status for your specific car. The registration isn’t stored.
Estimated market value
How we got this number — click for the breakdown, or to challenge it.£24,100
Range £19,750 – £28,900
medium confidence
Fair value — the 8-year mark is the sweet spot.
At 28,155 miles it’s about the ~28,698 typical for a 3-year-old.
Seen one for sale?
A data-led guide from the depreciation curve, UK parc trend and reliability — not financial advice.
How a 2023-registration Mercedes-Benz GLB loses value over time.
Based on the 2023 car with 28,155 miles you entered above — worth about £24,100 today — here is the cost of owning it for the next 5 years, at roughly 9,385 miles a year.
5-year total
£21,331
Per year
£4,266
All-in per mile
£0.45
Fuel per mile
17.3p
If a company carAround £561/mo Benefit-in-Kind tax at the 40% rate (£281/mo at 20%) — 37% band
If you're a company-car driver
At 37% BIK, a 40% taxpayer would pay about £561/month in company-car tax (£281/month at 20%) — on top of the running costs above. Full BIK table below for context.
Best age to buy — around 2 years
A 2-year-old example loses roughly £4,050 a year — 63% less than the £10,800 a one-year-old sheds. The steepest drop is behind it.
Uses current UK pump and home-charging prices (DESNZ weekly), typical-driver insurance and manufacturer service intervals. "Fuel per mile" is just the energy input — so an EV at ~9p and a diesel at ~22p make running-cost comparison direct. A guide; your own costs will vary.
Where this car ranks against the 340 vehicles in our index — higher is better.
Percentile rank across our full index. A measure is shown only where the data spreads meaningfully across the index.
How the available versions compare on price, running cost, and the headaches each tends to develop.
Rare premium compact 7-seater. Cross-shop BMW X1 (no 7-seat option), Audi Q3 (no 7-seat), Kia Sorento (cheaper, more space). The GLB earns its place via 7-seat configuration in compact premium SUV size.
Watch for
Fuel/energy costs based on this week’s UK averages (w/c 03/08/2026) · Petrol 159.9p/L, Diesel 179.2p/L, Electricity 27.0p/kWh · DESNZ
Group 30 of 50 (upper-mid — pricier to insure) · Comprehensive · 3 years NCB
Indicative annual comprehensive premiums for this car, by driver age band and risk profile. Pick the combination closest to your circumstances.
Estimated annual premium · typical, age 33-39
£870/ year
Roughly £73 per month
Typical
Average UK driver — 3 years NCB, average postcode, no recent claims.| Age band | Lower risk | Typical | Higher risk |
|---|---|---|---|
| Age 17-25 | £1,984 | £2,480 | £3,223 |
| Age 26-32 | £1,035 | £1,218 | £1,486 |
| Age 33-39Selected | £766 | £870 | £1,027 |
| Age 40-49 | £650 | £722 | £838 |
| Age 50+ | £579 | £644 | £760 |
How we estimate this
Indicative annual comprehensive premium estimates. The 'Typical' figure represents an average UK driver in each age band; Lower and Higher risk show the realistic spread driven by factors UK insurers legitimately price on (postcode, occupation, claims history, NCB, voluntary excess, modifications). Based on 10,000 miles/yr, £250 voluntary excess, and the no-claims bonus selected above. Always get individual quotes before buying.
Adjust the annual mileage to match how you'll actually use the car. Insurance is what you selected above (age 33-39, typical risk, 3 yrs NCB).
Routine service
£290
Annual main-dealer service
Major service
£280
Every 2 years, annualised
Road tax
£200
Standard rate, post year-one
Fuel
£1,664
41 mpg, £1.60/L
Insurance
£870
Age 33-39, group 30
Clean-air zones
✓ ULEZ compliantBased on London ULEZ standards — Birmingham, Bath, Bristol, Sheffield, Glasgow and other UK clean-air zones generally follow the same rules.
Excludes depreciation and unscheduled repairs (see next section).
What out-of-warranty repairs typically run, by mileage band. Your selected mileage is highlighted.
0-30k miles
£120
per year · low risk
30-60k miles
£360
per year · low risk
60-100k miles
£780
per year · medium risk
100k+ miles
£1,350
per year · high risk
215/65 R17 · 235/55 R18 · 235/50 R19
What a full set of four will cost you (including fit and balance), and which brand each tier of buyer should pick. A typical set lasts about 24,000 miles.
Budget
£400
set of 4, fitted · £85 per tyre
Mid-range
£580
set of 4, fitted · £130 per tyre
Premium
£840
set of 4, fitted · £195 per tyre
Factory options ranked by how much of their original cost they recover at resale. Anything above 70% return tends to make money back; below 40% is paying for your own enjoyment.
| Option | New cost | Added used value | Return |
|---|---|---|---|
Tow bar (factory-fit) Niche, but the buyers who want one will pay for it. | £650 | £450 | 69% |
Parking sensors & reversing camera Near-expected now — its absence costs more than its presence returns. | £500 | £300 | 60% |
Heated seats / cold-weather pack | £450 | £200 | 44% |
Adaptive / matrix LED headlights | £900 | £400 | 44% |
Metallic or premium paint Almost universal — an unusual colour is the bigger resale risk. | £600 | £200 | 33% |
Panoramic / opening roof | £1,100 | £350 | 32% |
Advanced driver-assistance pack | £1,500 | £450 | 30% |
Larger alloy wheels | £700 | £200 | 29% |
Premium sound system | £800 | £200 | 25% |
Drawn from owner reports and warranty data. Filtered for relevance to 28,155 miles.
Watch now
Failure typically happens around your current mileage.
Upcoming
A known weak point — but you haven't reached its usual mileage yet.
Already due
Past its usual failure mileage. Either already fixed, or about to.
Recorded in 6.9% of MOT tests over 100k miles — from 44,207 DVSA MOT tests analysed.
Recorded in 3.7% of MOT tests 60k-100k miles — from 44,207 DVSA MOT tests analysed.
Recorded in 1.7% of MOT tests 60k-100k miles — from 44,207 DVSA MOT tests analysed.
Recorded in 0.8% of MOT tests 60k-100k miles — from 44,207 DVSA MOT tests analysed.
Recorded in 1.5% of MOT tests over 100k miles — from 44,207 DVSA MOT tests analysed.
Recorded in 1.0% of MOT tests 60k-100k miles — from 44,207 DVSA MOT tests analysed.
"Parts low/medium/high" indicates how easy the replacement part is to source — discontinued or specialist parts mean longer workshop time and bigger bills.
Euro NCAP's independent crash-test rating for the Mercedes-Benz GLB, from its 2019 assessment.
The passenger compartment of the GLB remained stable in the frontal offset test.
Independent crash-test data from Euro NCAP. Star ratings reflect the test protocol of the year shown — newer protocols are stricter, so a 5-star from 2024 represents a higher bar than a 5-star from 2014. Euro NCAP ratings run for six years from publication; a lapsed rating means the protocol has moved on, not that the car performs any worse than it did on test.
How this model fares at its MOT as it ages — from 49,614 real DVSA test records.
MOT pass rate by age
A 3-year-old GLB passes its MOT 91.4% of the time; by 6 years that has slipped to 88.3%. The y-axis is zoomed to this model’s range so the trend is readable.
Longevity
Not enough older examples yet to gauge longevity.
What’s on the road
The fuel-type split of every GLB with MOT history in the DVSA record. From 29,228 vehicles tested at least once - not the number on the road today, which is lower.
What fails at the first MOT
The defect categories a GLB registered 2020–2023 fails on at its first MOT, from 15,512 first tests. Every car here is the same age and the same generation, so these are the faults that show up first - not the wear a high-mileage older example collects.
Share of first MOT tests recording at least one defect in that category. DVSA test-item categories, not parts: “Driver’s view” covers mirrors, wipers and glass.
Typical mileage by age
The average odometer reading for a GLB at MOT, by age — measured from the same DVSA records, not assumed. A useful yardstick for whether a given car has done more or fewer miles than its age suggests.
Mean recorded mileage at MOT by vehicle age, from DVSA test records. Ages below three are not shown: the first MOT is due at three years, so the few cars tested earlier are a self-selected minority rather than a representative sample. Ages with at least 10 tests shown.
Excellent
First-MOT pass rate and defect rate for cars registered 2020 onward (15,512 first tests), with cohort survival — high confidence.
MOT outlook · age 5 years
85th percentile — Better than most comparable cars
Based on 4,616 MOT tests · ranked against 248 catalogue models with comparable data
Where this car sits in the catalogue
Pass-rate distribution across 248 catalogue models
Safety recalls
Manufacturers occasionally issue safety recalls to fix a fault free of charge. You can check whether the Mercedes-Benz GLB, or your exact vehicle, has any outstanding recalls on the official DVSA service.
Check on GOV.UKOpens the Driver & Vehicle Standards Agency recall checker. Choose the make, model and year of manufacture — no registration needed.
A general indicator from UK 2025 theft data and this car’s characteristics — not a prediction for any one vehicle.
Whole-car theft
Higher
Desirable SUVs like this are relay-theft targets — keyless entry can be exploited from the driveway in under a minute.
Parts theft
Higher
Hybrid versions are a catalytic-converter target — a hybrid cat is rich in precious metals and can be cut out in about a minute.
Worth doing
Whether driving a Mercedes-Benz GLB into a UK clean-air zone will cost you anything. Rules use the same Euro standard across most zones — petrol from 2006 and diesel from 2015 onwards are exempt; pure electric is always exempt.
| City | Area | Daily charge | Likely outcome |
|---|---|---|---|
| London | All of Greater London (within the M25) | £12.50 | Likely exempt Diesel from September 2015 meets Euro 6. |
| Birmingham | Inside the A4540 Middleway | £8.00 | Likely exempt Diesel from September 2015 meets Euro 6. |
| Bristol | City centre and part of the Portway | £9.00 | Likely exempt Diesel from September 2015 meets Euro 6. |
| Glasgow | City centre | — | Likely exempt Diesel from September 2015 meets Euro 6. |
| Edinburgh | City centre | — | Likely exempt Diesel from September 2015 meets Euro 6. |
| Aberdeen | City centre | — | Likely exempt Diesel from September 2015 meets Euro 6. |
| Dundee | City centre | — | Likely exempt Diesel from September 2015 meets Euro 6. |
Model-level guidance only. To check a specific registration, use the official gov.uk clean-air zone checker. Zone charges and boundaries are set by local councils and change over time.
What HMRC's Benefit-in-Kind charge looks like if you ran this Mercedes-Benz GLB as a company car, by tax year and income-tax band. Calculated from a CO₂ of 170 g/km, using £45,500 as the P11D value.
| Tax year | BIK % | Tax @ 20% | Tax @ 40% | Monthly @ 20% | Monthly @ 40% |
|---|---|---|---|---|---|
| 2025-26 | 37% | £3,367 | £6,734 | £281 | £561 |
| 2026-27 | 37% | £3,367 | £6,734 | £281 | £561 |
| 2027-28 | 38% | £3,458 | £6,916 | £288 | £576 |
| 2028-29 | 39% | £3,549 | £7,098 | £296 | £592 |
| 2029-30 | 39% | £3,549 | £7,098 | £296 | £592 |
P11D value is approximated from the latest new price; the exact figure on your tax code will depend on options fitted. The 4% diesel surcharge applies only to non-RDE2 (pre-2021) diesels — we assume RDE2 compliance for current models. Bands and rates from HMRC's Autumn Budget 2024 confirmation through 2029/30.
How well-supported Mercedes-Benz is across the UK — a practical read on how easy servicing, parts and warranty work will be to find.
Franchised UK dealers
~125
Large network
Premium mainstream
Network size relative to the UK's largest (Mercedes-Benz is 2.8% of all franchised outlets)
Servicing, parts and warranty work are easy to find UK-wide, and most independent garages know the brand well — which keeps maintenance competitive.
For context, the UK has roughly 4,500 franchised car-dealer outlets in total, plus about 15,500 independent garages.
Approximate figures, curated from public UK industry sources (NFDA, Car Dealer Magazine). Franchised networks shrink year on year — these indicate network size, not an exact count.
These are segment estimates, not manufacturer figures. 296 of 325 catalogued cars share one of 14 identical dimension sets, so they describe a class rather than this particular car. Sourced figures replace them model by model.
Length
4,600 mm
Width
1,880 mm
Height
1,650 mm
Kerb weight
1,750 kg
Boot
500–1,600 L
Fuel tank
60 L
How the UK Mercedes-Benz GLB fleet splits: taxed and on the road, parked off the road on a SORN, and gone from the register where that figure is available.
Currently registered
23,288
Currently taxed & on road
22,654
97% of all registered
SORN (off road)
634
3% of all registered
Scrapped or exported
n/a
not in this DfT extract
UK fleet trend — 2020 to 2025
+17% vs 2024Source: DfT VEH0124 vehicle licensing statistics (year-end 2025) · Updated 29 Jul 2026
Same underpinnings
Mercedes' front-wheel-drive platform underpinning compact cars and CUVs. Different badges, often substantially different residuals, but broadly the same mechanicals and repair cost profile.
Mercedes Modular Front Architecture 2 · Mercedes-Benz
Common questions
Answers are generated from this car's Forecourt data — DVSA MOT records, DfT licensing statistics and our valuation model — and update with the weekly data refresh.