Loading comparison
BYD Sealion 7 vs Mercedes-Benz EQB
Selected trimComfortChange trim300 mi · 82.5 kWh · £44,990
Selected trim300 4MATIC · 2022-25Change trim257 mi · 69.7 kWh · £52,145
At a glance
The Mercedes-Benz EQB was replaced by the Mercedes-Benz GLB in 2026. Compare the BYD Sealion 7 with the Mercedes-Benz GLB
In this comparison, BYD Sealion 7 leads on value for money and charging speed, while the Mercedes-Benz EQB leads on motorway range, running costs and city driving.
Which should you choose?
Choose the BYD Sealion 7 if...
- you want the most for your money - best overall spec per pound
- you need the fastest charging of these options
Choose the Mercedes-Benz EQB if...
- you do long motorway journeys - it has the best estimated real-world range at speed
- you want the lowest running costs - from just 2.3p per mile on off-peak electricity
- you need the best car for city driving and tight parking
How we reached the recommendation
Verdict
Our take
The Mercedes-Benz EQB leads in the most categories, but each car here has its strengths.
ValueBYD
BYD
6
Mercedes-Benz
4.3
Motorway RangeMercedes-Benz
BYD
3.1
Mercedes-Benz
3.7
Family
BYD
8
Mercedes-Benz
7.8
Too close to call
ChargingBYD
BYD
5.9
Mercedes-Benz
2.1
Cost Per MileMercedes-Benz
BYD
0.8
Mercedes-Benz
3
City DrivingMercedes-Benz
BYD
2.2
Mercedes-Benz
3.9
What each car does better
See the specification differences behind the verdict, with supporting figures for each advantage.
BYD Sealion 7
Comfort
- £7,155 cheaper
- 43 miles more WLTP range
- 50 kW faster rapid charging
- 8 min quicker 10-80% rapid charge
- 62 kW more power
- 1.3s quicker 0-62 mph
Key specifications
Compare the key specifications for your selected trims.
| Measure | BYD Sealion 7Comfort | Mercedes-Benz EQB300 4MATIC |
|---|---|---|
| Price | £44,990 (better) | £52,145 |
| Official range | 300 miles (better) | 257 miles |
| Boot space | 520 L (better) | 495 L |
| 10-80% rapid charge | 24 min (better) | 32 min |
| 0-62 mph | 6.7 sec (better) | 8 sec |
Size Comparison
View:
Align by:
BYD Sealion 7
Mercedes-Benz EQB
Length
BYD Sealion 74,830mm
Mercedes-Benz EQB4,684mm-146mm
Width
BYD Sealion 71,925mm
Mercedes-Benz EQB1,834mm-91mm
Height
BYD Sealion 71,620mm-47mm
Mercedes-Benz EQB1,667mm
Space, size & parking
Parking & manoeuvring
Compare exterior dimensions to assess how each car fits UK parking spaces.
| Measure | BYD Sealion 7Comfort | Mercedes-Benz EQB300 4MATIC |
|---|---|---|
| Length | 4,830 mm | 4,684 mm |
| Width (mirrors folded) | 1,925 mm | 1,834 mm (better) |
| Width with mirrors out | 2,189 mm | 2,020 mm (better) |
| Height | 1,620 mm | 1,667 mm |
| Turning circle | 11.7 m | 11.7 m |
| Clearance in a standard bayA standard UK parking bay is 2,400 mm wide. | 475 mm spare | 566 mm spare (better) |
People & luggage
Compare seating, child-seat mounting points, boot space and towing capacity.
| Measure | BYD Sealion 7Comfort | Mercedes-Benz EQB300 4MATIC |
|---|---|---|
| Seats | 5 | 7 (better) |
| ISOFIX child-seat points | Not available | 4 |
| Boot space (seats up) | 520 L (better) | 495 L |
| Boot space (seats down) | 1789 L (better) | 1410 L |
| Frunk | 58 L | Not available |
| Towing capacity (braked) | 750 kg | 1,700 kg (better) |
How each stacks up
Percentile ranks against UK EVs of the same body style.
BYD Sealion 7
- One of 33 of 232 UK EVs in our catalogue with V2L (vehicle-to-load) support.
- At 4,830 mm, longer than 80% of SUVs we track.
Mercedes-Benz EQB
Not enough peers to make confident percentile claims.
Full specifications
| Specification |  BYD Sealion 7 Comfort |  Mercedes-Benz EQB 300 4MATIC |
|---|---|---|
| Dimensions | ||
| Length | 4.83m | 4.68m-146mm |
| Width | 1.93m | 1.83m-91mm |
| Width (mirrors) | 2.19m | 2.02m-169mm |
| Height | 1.62m | 1.67m+47mm |
| Wheelbase | 2.93m | 2.83m-101mm |
| Ground Clearance | 157mm | 170mm+13mm |
| Capacity | ||
| Boot (seats up) | 520L (better) | 495L |
| Boot (seats down) | 1789L (better) | 1410L |
| Frunk | 58L | Not available |
| Seats | 5 | 7 (better) |
| Practicality | ||
| Turning Circle | 11.7m | 11.7m |
| Kerb Weight | 2,225kg | 2,105kg (better) |
| Towing Capacity | 750kg | 1,700kg (better) |
| Electric | ||
| Battery | 82.5kWh (better) | 69.7kWh |
| Range (WLTP) | 300 mi (better) | 257 mi |
| Max DC Charge | 150kW (better) | 100kW |
| Pricing | ||
| UK MSRP | £44,990 (better) | £52,145 |
| Details | ||
| Body Style | SUV | SUV |
| Available | 2025+ | 2022–2025 |
Range & charging
Range, charging & battery
Check official and estimated driving range alongside charging speeds, efficiency and battery technology.
| Measure | BYD Sealion 7Comfort | Mercedes-Benz EQB300 4MATIC |
|---|---|---|
| Official range (WLTP) | 300 miles (better) | 257 miles |
| Estimated motorway rangeEVcarsguide estimate at sustained motorway speed. | 204 miles | 214 miles (better) |
| 10-80% rapid charge time | 24 min (better) | 32 min |
| Max rapid charge rate | 150 kW (better) | 100 kW |
| Home AC charging | 11 kW | 11 kW |
| Energy consumption | 199 Wh/km | Not available |
| Usable battery capacity | 82.5 kWh (better) | 66.5 kWh |
| Battery chemistry | LFP | NMC |
| Battery architecture | Not available | 400V |
| Heat pump | Standard | Standard |
Driving & everyday use
Performance & drivetrain
Compare acceleration, power and drivetrain specifications for the selected trims.
| Measure | BYD Sealion 7Comfort | Mercedes-Benz EQB300 4MATIC |
|---|---|---|
| 0-62 mph | 6.7 sec (better) | 8 sec |
| Power | 230 kW (better) | 168 kW |
| Torque | 380 Nm | 390 Nm (better) |
| Drivetrain | RWD | AWD |
What the critics say
See how UK motoring publications rate each car in their road tests.
BYD Sealion 7
Comfort
6.6/10
average across 6 reviews
- Parkers3.9/5
- Auto Express3.5/5
- Electrifying.com7/10
Mercedes-Benz EQB
300 4MATIC
Watch the reviews
Watch selected video reviews here, or visit each model page for the full collection.
Reviews and videos discuss each model overall; the specifications above apply to your selected trims.
Prices & deals
New and used prices
Current pricing and recent used-market behaviour.
| Measure | BYD Sealion 7Comfort | Mercedes-Benz EQB300 4MATIC |
|---|---|---|
| Used market price from | £30,211 | £25,048 |
| Average used price | £30,993 | £27,272 |
| Recent used-price trend | Down 10.1% over ~6 months | Up 21.8% over ~6 months |
Used prices are indicative figures gathered from independent UK dealer listings and change frequently.
Calculate your real costs
For a useful running-cost comparison, factor in your mileage, charging access and current petrol or diesel car alongside the EV estimate.
Compare with petrol or diesel
Compare purchase price, energy, road tax and maintenance with a petrol or diesel alternative.
Calculate company-car tax
Work out monthly Benefit-in-Kind using current and future HMRC rates.
Cost per mile
Compare EV charging costs per mile with petrol and diesel using your charging options.
Check a lease quote
Assess the effective monthly cost alongside the list price and expected depreciation.
Safety & ownership confidence
Euro NCAP - BYD Sealion 7 Comfort
Tested 2025
Adult Occupant87%
Child Occupant93%
Vulnerable Road Users76%
Safety Assist79%
Full result on euroncap.com (opens in new tab)
Euro NCAP - Mercedes-Benz EQB 300 4MATIC
Tested 2019
Adult Occupant95%
Child Occupant91%
Vulnerable Road Users78%
Safety Assist74%
Warranty
Check the published battery warranty cover for each selected trim.
| Measure | BYD Sealion 7Comfort | Mercedes-Benz EQB300 4MATIC |
|---|---|---|
| Battery warranty | 8 years | 8 years |
| Battery warranty distance | 250,000 km (better) | 160,000 km |
Buying options
Get a quote
BYD Sealion 7
Used on AutoTraderLease deals
Mercedes-Benz EQB
Used on AutoTraderLease deals
Live used listings
Active inventory from independent UK dealers.
BYD Sealion 7
No active listings.
Mercedes-Benz EQB
- £29,5992024Car360View
- £24,9102023Car360View
- £24,0992023Car360View
Frequently asked questions
Is the Mercedes-Benz EQB worth the extra £7,155 over the BYD Sealion 7?
The Mercedes-Benz EQB costs £7,155 more than the BYD Sealion 7. For that premium it adds 2 more seats (7 versus 5). The BYD Sealion 7 is not just cheaper - it also offers 43 miles more WLTP range, 50 kW faster peak rapid charging and 62 kW more power. On EVcarsguide's combined category scores, the Mercedes-Benz EQB comes out ahead overall.
Which is cheaper to own over 5 years, the BYD Sealion 7 or the Mercedes-Benz EQB?
The BYD Sealion 7 is £7,155 cheaper to buy. The Mercedes-Benz EQB is cheaper to charge, roughly £184 a year versus £216 for the BYD Sealion 7, at 8,000 miles on an off-peak home tariff. Add 5 years of charging and the BYD Sealion 7 comes out roughly £6,995 cheaper overall. These figures cover list price and home charging only - insurance, servicing, tyres and depreciation will move the real total.
What are the BYD Sealion 7 and Mercedes-Benz EQB like on a long motorway trip?
EVcarsguide estimates a real-world motorway range of about 204 miles for the BYD Sealion 7 and 214 miles for the Mercedes-Benz EQB - effectively matched, and both well below their WLTP figures because sustained high speed is the hardest case for an EV. A rapid charge to 80% takes around 24 minutes in the BYD Sealion 7 and 32 in the Mercedes-Benz EQB, so the BYD Sealion 7 loses less time at each stop.
Which is easier to park and drive in town, the BYD Sealion 7 or the Mercedes-Benz EQB?
The Mercedes-Benz EQB is the easier car for tight UK car parks: it is 91 mm narrower than the BYD Sealion 7. In a standard 2,400 mm bay that leaves about 566 mm of total clearance for the Mercedes-Benz EQB and about 475 mm of total clearance for the BYD Sealion 7.
Which battery will hold up better as a used buy, the BYD Sealion 7 or the Mercedes-Benz EQB?
Over a 8-year ownership window EVcarsguide's degradation model projects roughly 90% battery health for the BYD Sealion 7 and 84% for the Mercedes-Benz EQB. That gives the BYD Sealion 7 a modest edge in retained real-world range. The BYD Sealion 7's LFP-type pack tolerates daily 100% charging, while the Mercedes-Benz EQB's NMC-type pack lasts longest kept to about 80% for everyday use. Both batteries carry a 8-year manufacturer warranty.
Go deeper on each car
Visit the full model pages for owner feedback, expert reviews, used prices and battery-health information.
Compare against other rivals
Compare similarly sized and priced electric cars before finalising your shortlist.
More BYD Sealion 7 comparisons
More Mercedes-Benz EQB comparisons
See both cars in our rankings
EVcarsguide scores every verified EV on price, range, family use and running costs. Here is where this pair appears.
Where the BYD Sealion 7 and Mercedes-Benz EQB rank among the best family EVsWhere the BYD Sealion 7 and Mercedes-Benz EQB rank among the best electric SUVsWhere the BYD Sealion 7 and Mercedes-Benz EQB rank among the best motorway EVsWhere the BYD Sealion 7 and Mercedes-Benz EQB rank among the best city EVsWhere the BYD Sealion 7 and Mercedes-Benz EQB rank among the cheapest EVs to runWhere the BYD Sealion 7 and Mercedes-Benz EQB rank among EVs with the biggest boots
If neither is quite right
Explore other verified electric cars that may better suit the priorities this pair does not meet.
Further reading
Explore buying and ownership guides to help you choose between these electric cars.
GuideBuying a Used BYD Sealion 7 (2025 on): Comfort, Design or Excellence & What to Pay
A used BYD Sealion 7 buyer’s guide: Comfort RWD, Design AWD and Excellence AWD, the steep depreciation, BYD’s 8-year battery warranty, charging speeds, real-world range, what owners report and a printable checklist.
GuideBuying a Used Mercedes EQB (2022-2025): 300, 350 or 250+, Recalls, Real Range & What to Pay
A used Mercedes EQB buyer’s guide: the seven-seat 300 and 350 4MATIC vs the 2024 250+, the steering software recall, real-world range, the battery warranty, what to pay and a printable checklist.
Data accuracy
Specs are sourced from manufacturer websites and manually reviewed. These figures were last verified .