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Mercedes-Benz GLB vs Tesla Model 3
Selected trim250+ Electric380 mi · 85 kWh · £46,100
Selected trimRWDChange trim332 mi · 60 kWh · £37,990
At a glance
In this comparison, Mercedes-Benz GLB leads on value for money, motorway range and family practicality, while the Tesla Model 3 leads on running costs.
Which should you choose?
Choose the Mercedes-Benz GLB if...
- you want the most for your money - best overall spec per pound
- you do long motorway journeys - it has the best estimated real-world range at speed
- you need the most family-friendly option with good safety and space
- you need the fastest charging of these options
Choose the Tesla Model 3 if...
- you want the lowest running costs - from just 1.8p per mile on off-peak electricity
How we reached the recommendation
Verdict
Our take
The Mercedes-Benz GLB leads in the most categories, but each car here has its strengths.
ValueMercedes-Benz
Mercedes-Benz
7
Tesla
6.4
Motorway RangeMercedes-Benz
Mercedes-Benz
6.3
Tesla
5.5
FamilyMercedes-Benz
Mercedes-Benz
8.7
Tesla
7.1
ChargingMercedes-Benz
Mercedes-Benz
9.1
Tesla
2.3
Cost Per MileTesla
Mercedes-Benz
3.5
Tesla
8.8
City Driving
Mercedes-Benz
4
Tesla
4
Too close to call
What each car does better
See the specification differences behind the verdict, with supporting figures for each advantage.
Mercedes-Benz GLB
250+ Electric
- 48 miles more WLTP range
- 145 kW faster rapid charging
- 0.4 m tighter turning circle
- 2 more seats
- 1500 kg more towing capacity
Tesla Model 3
RWD
- £8,110 cheaper
- 142 litres more boot space
- 1.2s quicker 0-62 mph
- 34 Wh/km more efficient
Key specifications
Compare the key specifications for your selected trims.
| Measure | Mercedes-Benz GLB250+ Electric | Tesla Model 3RWD |
|---|---|---|
| Price | £46,100 | £37,990 (better) |
| Official range | 380 miles (better) | 332 miles |
| Boot space | 540 L | 682 L (better) |
| 10-80% rapid charge | 20 min | Not available |
| 0-62 mph | 7.4 sec | 6.2 sec (better) |
Size Comparison
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Mercedes-Benz GLB
Tesla Model 3
Length
Mercedes-Benz GLB4,732mm
Tesla Model 34,721mm-11mm
Width
Mercedes-Benz GLB1,861mm-72mm
Tesla Model 31,933mm
Height
Mercedes-Benz GLB1,687mm
Tesla Model 31,440mm-247mm
Space, size & parking
Parking & manoeuvring
Compare exterior dimensions to assess how each car fits UK parking spaces.
| Measure | Mercedes-Benz GLB250+ Electric | Tesla Model 3RWD |
|---|---|---|
| Length | 4,732 mm | 4,721 mm |
| Width (mirrors folded) | 1,861 mm (better) | 1,933 mm |
| Width with mirrors out | 2,029 mm (better) | 2,088 mm |
| Height | 1,687 mm | 1,440 mm |
| Turning circle | 11.2 m (better) | 11.6 m |
| Clearance in a standard bayA standard UK parking bay is 2,400 mm wide. | 539 mm spare (better) | 467 mm spare |
People & luggage
Compare seating, child-seat mounting points, boot space and towing capacity.
| Measure | Mercedes-Benz GLB250+ Electric | Tesla Model 3RWD |
|---|---|---|
| Seats | 7 (better) | 5 |
| Boot space (seats up) | 540 L | 682 L (better) |
| Frunk | 127 L | Not available |
| Towing capacity (braked) | 1,500 kg (better) | 0 kg |
How each stacks up
Percentile ranks against UK EVs of the same body style.
Mercedes-Benz GLB
- A 127 L frunk, one of 4 of 232 UK EVs in our catalogue with a front boot of 127 L or more.
- 380 mile WLTP range, longer than 90% of SUVs we track.
- Peak DC charging of 320 kW, faster than 90% of SUVs in our catalogue.
Tesla Model 3
- 2nd-largest boot among saloon EVs in our catalogue at 682 L.
- At 4,721 mm, shorter than 90% of saloon EVs in our UK catalogue.
- Uses 130 Wh/km on the WLTP cycle, more efficient than 100% of saloon EVs we track.
Full specifications
| Specification |  Mercedes-Benz GLB 250+ Electric |  Tesla Model 3 RWD |
|---|---|---|
| Dimensions | ||
| Length | 4.73m | 4.72m-11mm |
| Width | 1.86m | 1.93m+72mm |
| Width (mirrors) | 2.03m | 2.09m+59mm |
| Height | 1.69m | 1.44m-247mm |
| Wheelbase | 2.89m | Not available |
| Ground Clearance | Not available | 137mm |
| Capacity | ||
| Boot (seats up) | 540L | 682L* (better) |
| Frunk | 127L | Not available |
| Seats | 7 (better) | 5 |
| Practicality | ||
| Turning Circle | 11.2m (better) | 11.6m |
| Kerb Weight | 2,270kg | 1,772kg (better) |
| Towing Capacity | 1,500kg (better) | Not available |
| Electric | ||
| Battery | 85kWh (better) | 60kWh |
| Range (WLTP) | 380 mi (better) | 332 mi |
| Max DC Charge | 320kW (better) | 175kW |
| Pricing | ||
| UK MSRP | £46,100 | £37,990 (better) |
| Details | ||
| Body Style | SUV | Saloon |
| Available | 2026+ | 2024+ |
* Tesla Model 3: Tesla publishes 682 L as total cargo volume (boot + frunk, measured to roof) — not directly comparable to standard VDA figures used by other brands.
* Tesla Model 3: Not published by Tesla; verified from multiple independent sources.
Range & charging
Range, charging & battery
Check official and estimated driving range alongside charging speeds, efficiency and battery technology.
| Measure | Mercedes-Benz GLB250+ Electric | Tesla Model 3RWD |
|---|---|---|
| Official range (WLTP) | 380 miles (better) | 332 miles |
| Estimated motorway rangeEVcarsguide estimate at sustained motorway speed. | 268 miles (better) | 229 miles |
| 10-80% rapid charge time | 20 min | Not available |
| Max rapid charge rate | 320 kW (better) | 175 kW |
| Home AC charging | 22 kW | Not available |
| Energy consumption | 164 Wh/km | 130 Wh/km (better) |
| Usable battery capacity | 85 kWh (better) | 57.5 kWh |
| Battery chemistry | NMC | LFP |
| Battery architecture | 800V | Not available |
Driving & everyday use
Performance & drivetrain
Compare acceleration, power and drivetrain specifications for the selected trims.
| Measure | Mercedes-Benz GLB250+ Electric | Tesla Model 3RWD |
|---|---|---|
| 0-62 mph | 7.4 sec | 6.2 sec (better) |
| Power | 200 kW | 208 kW (better) |
| Torque | 335 Nm | 340 Nm (better) |
| Drivetrain | RWD | RWD |
What the critics say
See how UK motoring publications rate each car in their road tests.
Mercedes-Benz GLB
250+ Electric
Tesla Model 3
RWD
8.5/10
average across 6 reviews
- DrivingElectric4.5/5
- Auto Express4.5/5
- Electrifying.com9/10
Watch the reviews
Watch selected video reviews here, or visit each model page for the full collection.
Mercedes-Benz GLB
All 3 videos
Reviews and videos discuss each model overall; the specifications above apply to your selected trims.
Prices & deals
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 - Mercedes-Benz GLB 250+ Electric
Tested 2025
Adult Occupant92%
Child Occupant88%
Vulnerable Road Users78%
Safety Assist74%
Full result on euroncap.com (opens in new tab)
Euro NCAP - Tesla Model 3 RWD
Tested 2025
Adult Occupant90%
Child Occupant93%
Vulnerable Road Users89%
Safety Assist87%
Full result on euroncap.com (opens in new tab)
Warranty
Check the published battery warranty cover for each selected trim.
| Measure | Mercedes-Benz GLB250+ Electric | Tesla Model 3RWD |
|---|---|---|
| Battery warranty | Not available | 8 years |
| Battery warranty distance | Not available | 160,934 km |
Buying options
Get a quote
Mercedes-Benz GLB
Used on AutoTraderLease deals
Tesla Model 3
Used on AutoTraderLease deals
Live used listings
Active inventory from independent UK dealers.
Mercedes-Benz GLB
No active listings.
Tesla Model 3
- £32,6462025Car360View
- £30,2992025Car360View
- £29,6992025Car360View
Frequently asked questions
Is the Mercedes-Benz GLB worth the extra £8,110 over the Tesla Model 3?
The Mercedes-Benz GLB costs £8,110 more than the Tesla Model 3. For that premium it adds 48 miles more WLTP range, 145 kW faster peak rapid charging and 2 more seats (7 versus 5). The Tesla Model 3 is not just cheaper - it also offers 142 litres more boot space, a 1.2s quicker 0-62mph time and lower energy use, 130 versus 164 Wh/km. On EVcarsguide's combined category scores, the Mercedes-Benz GLB comes out ahead overall.
Which is cheaper to own over 5 years, the Mercedes-Benz GLB or the Tesla Model 3?
The Tesla Model 3 is £8,110 cheaper to buy. The Tesla Model 3 is cheaper to charge, roughly £144 a year versus £176 for the Mercedes-Benz GLB, at 8,000 miles on an off-peak home tariff. Add 5 years of charging and the Tesla Model 3 comes out roughly £8,270 cheaper overall. These figures cover list price and home charging only - insurance, servicing, tyres and depreciation will move the real total.
What are the Mercedes-Benz GLB and Tesla Model 3 like on a long motorway trip?
EVcarsguide estimates a real-world motorway range of about 268 miles for the Mercedes-Benz GLB and 229 miles for the Tesla Model 3 - both below their WLTP figures, because sustained high speed is the hardest case for an EV. The Mercedes-Benz GLB goes roughly 39 miles further between charging stops.
Which is easier to park and drive in town, the Mercedes-Benz GLB or the Tesla Model 3?
The Mercedes-Benz GLB is the easier car for tight UK car parks: it is 72 mm narrower than the Tesla Model 3. In a standard 2,400 mm bay that leaves about 539 mm of total clearance for the Mercedes-Benz GLB and about 467 mm of total clearance for the Tesla Model 3. The Mercedes-Benz GLB also turns in a 0.4 m tighter circle, which helps with U-turns and multi-storey ramps.
Which battery will hold up better as a used buy, the Mercedes-Benz GLB or the Tesla Model 3?
Over a 8-year ownership window EVcarsguide's degradation model projects roughly 84% battery health for the Mercedes-Benz GLB and 92% for the Tesla Model 3. That gives the Tesla Model 3 a modest edge in retained real-world range. The Tesla Model 3's LFP-type pack tolerates daily 100% charging, while the Mercedes-Benz GLB's NMC-type pack lasts longest kept to about 80% for everyday use.
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 Mercedes-Benz GLB comparisons
More Tesla Model 3 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 Mercedes-Benz GLB and Tesla Model 3 rank among the best family EVsWhere the Mercedes-Benz GLB and Tesla Model 3 rank among long-range EVsWhere the Mercedes-Benz GLB and Tesla Model 3 rank among the best motorway EVsWhere the Mercedes-Benz GLB and Tesla Model 3 rank among the best city EVsWhere the Mercedes-Benz GLB and Tesla Model 3 rank among the cheapest EVs to runWhere the Mercedes-Benz GLB and Tesla Model 3 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.
Data accuracy
Specs are sourced from manufacturer websites and manually reviewed. These figures were last verified .