2026 BMW M5 vs 2026 Mercedes-Benz S-Class

$121,900 · Sedan

$119,500 · Sedan

Comparison Overview

Deciding between ultimate performance and ultimate luxury often boils down to horsepower figures versus real-world running costs. If you're looking at the 2026 BMW M5 ($121,900 MSRP) and the 2026 Mercedes-Benz S-Class ($119,500 MSRP), you are choosing between brute force and balance. The M5 unleashes a staggering 717 hp and 738 lb-ft of torque, far outpacing the S-Class's 442 hp. However, this power comes at a price: the M5 yields only 14 combined MPG, whereas the S-Class achieves 23 combined MPG, creating a notable 9 MPG difference. While the M5 has a slightly smaller trunk at 16.5 cu ft versus the S-Class's 12.8 cu ft, the primary trade-off is raw speed versus day-to-day efficiency and passenger comfort, highlighted by the M5's 29-mile electric range complementing its powerful hybrid drivetrain.

Size Comparison

Performance

Fuel Efficiency

Full Specifications

Our Verdicts

🚗 Best for Commuters

2026 Mercedes-Benz S-Class

The Mercedes-Benz S-Class wins for daily commuting due to its significantly better 23 combined MPG compared to the M5's 14 MPG.

👨‍👩‍👧‍👦 Best for Families

2026 Mercedes-Benz S-Class

The S-Class offers a larger, more comfortable luxury experience expected by families, despite the M5 having slightly more cargo space at 16.5 cu ft versus 12.8 cu ft.

🏎️ Best for Enthusiasts

2026 BMW M5

The BMW M5 is the clear choice for driving enthusiasts, offering 717 hp and 738 lb-ft of torque.

💰 Best Value

2026 Mercedes-Benz S-Class

The S-Class provides a lower initial cost, $119,500 versus $121,900, paired with vastly superior fuel economy.

Choose the BMW M5 if...

You prioritize maximum acceleration, benefiting from the M5's 717 horsepower rating.
You want the advantage of the M5's 29-mile dedicated electric range for local trips.
You prefer the immediate responsiveness of the 8-speed automatic transmission over the S-Class's 9-speed unit.

Choose the Mercedes-Benz S-Class if...

You want to spend less time at the pump, thanks to the S-Class achieving 29 highway MPG.
You value superior fuel economy, realizing a 9 MPG advantage over the M5.
You prefer a slightly longer vehicle for a more stately road presence (209.5 inches vs. 200.6 inches).

Key Dimensions

Dimension	BMW M5	Mercedes-Benz S-Class
Length	200.6"	209.5"
Width	77.6"	75.6"
Height	59.4"	59.2"
Wheelbase	118.3"	126.6"

Features Comparison

Safety

Feature	BMW	Mercedes-Benz
Blind Spot Monitor	✓	✓
Lane Departure Warning	✓	✓
Lane Keeping Assist System	✓	✓
Rear Cross Traffic Alert	✓	✓
Driver Attention Alert	✓	✓
Pre-Collision Safety System	✓	✓
Post-Collision Safety System	✓	✓
Dual Front Side-Mounted Airbags	✓	✓
Front Head Airbags	✓	✓
Rear Head Airbags	✓	✓
Passenger Airbag Occupant Sensing Deactivation	✓	✓
Electronic Stability Control	✓	✓
Traction Control System	✓	✓
LATCH System	✓	✓
Rear Door Child Safety Locks	✓	✓
Anti-lock Brakes (ABS)	4-Wheel	4-Wheel
Brake Drying	✓	✓
Front Ventilated Disc Brakes	✓	✓
Rear Ventilated Disc Brakes	✓	✓
Brake Preparation System	✓	✓
Brake Assist	✓	✓
Tire Pressure Monitoring System	✓	✓
Automatic Headlights	✓	✓
Headlight Delay-Off	✓	✓
LED Headlights	✓	✓
Self-Leveling Headlights	✓	✓
Daytime Running Lights	✓	✓
Cornering Lights	✓	✓
Integrated Turn Signal Mirrors	✓	✓
Front Headrests	2	2
Front Power Adjustable Headrests	✓	✓
Rear Headrests	3	3
Rear Height Adjustable Headrests	✓	—
Rear Center 3-Point Seatbelt	✓	✓
Anti-Theft Alarm System (Remote)	✓	✓
Front Cross Traffic Alert	—	✓
Dual Rear Side-Mounted Airbags	—	✓
Adaptive Headlights	—	✓
Rear Multi-Adjustable Headrests	—	✓
Engine Immobilizer	—	✓

Engine

Feature	BMW	Mercedes-Benz
Base Engine Displacement	4.4 L	3.0 L
Number of Cylinders	V8	inline 6
Base Engine Type	plug-in hybrid	mild hybrid
Horsepower	717 hp @ 5600 rpm	442 hp
Torque	738 lb-ft @ 1800 rpm	413 lb-ft
Number of Valves	32	24
Camshaft Type	Double overhead cam (DOHC)	Double overhead cam (DOHC)
Variable Valve Timing	Variable	Variable
Fuel Injection Type	✓	✓

Drive Train

Feature	BMW	Mercedes-Benz
Transmission Type	8-speed shiftable automatic	9-speed shiftable automatic
Drivetrain Type	all wheel drive	all wheel drive
[object Object]	✓	—
[object Object]	✓	—
Center Differential Type	—	Limited Slip

Fuel

Feature	BMW	Mercedes-Benz
Fuel Type	premium unleaded (required)	premium unleaded (required)
EPA Fuel Economy (City/Highway)	12/19 MPG	20/29 MPG
EPA Fuel Economy (Combined)	14 MPG	23 MPG
EPA Driving Range (City/Highway)	190.8/302.1 mi.	400.0/580.0 mi.
EPA Efficiency (City/Highway MPGe)	41/57 MPGe	—
EPA Efficiency (Combined MPGe)	47 MPGe	—
EPA Electric Driving Range	29 mi.	—
EPA Energy Consumption (kWh/100 mi)	55	—
Charging Time (240V)	2.0 hr.	—
Fuel Tank Capacity	15.9 gal.	20.0 gal.
DC Fast Charging Port Type	SAE J1772	—

Comfort & Convenience

Feature	BMW	Mercedes-Benz
Push Button Start	✓	✓
Power Tilt and Telescopic Steering Wheel	✓	✓
Transmission Controls on Steering Wheel	✓	✓
Cruise Control on Steering Wheel	✓	✓
Audio Controls on Steering Wheel	✓	✓
Electric Power Steering	✓	✓
Rear View Camera	✓	✓
Front Parking Sensors	✓	✓
Rear Parking Sensors	✓	✓
Wireless Charging Pad	✓	✓
Cruise Control	✓	—
Universal Remote Transmitter	✓	✓
Front Cupholders	✓	✓
Rear Cupholders	✓	✓
Front Door Pockets	✓	✓
Rear Door Pockets	✓	✓
Leather Steering Wheel	✓	✓
Heated Steering Wheel	✓	—
Four Zone Climate Control	✓	—
Rear Ventilation Ducts	✓	✓
Interior Air Filtration	✓	✓
Extended Cabin Heating/Cooling	✓	✓
Dual Vanity Mirrors	✓	✓
Auto-Dimming Rearview Mirror	✓	✓
Turn Signal Indicators in Mirrors	✓	✓
Front View Camera	—	✓
Side View Camera	—	✓
Automatic Parking Assist	—	✓
Adaptive Cruise Control	—	✓
Overhead Console with Storage	—	✓
Front Seatback Storage	—	✓
Wood Trim on Steering Wheel	—	✓
Dual Zone Climate Control	—	✓
Sun Sensor	—	✓

In Car Entertainment

Feature	BMW	Mercedes-Benz
Infotainment Display	14.9 in	12.8 in
AM/FM Stereo	✓	✓
Premium Speaker Brand	Bowers & Wilkins	Burmester
Stereo Power	655W	710W
Speaker System	18	15
Surround Audio	Discrete	Discrete
Android Auto (Wireless)	✓	✓
Apple CarPlay (Wireless)	✓	✓
USB Port	✓	✓
USB Port with External Media Control	✓	✓
Satellite Radio	✓	✓
Satellite Radio Trial Period	12 months	6 months
Subwoofer Count	—	2
Auxiliary Audio Input	—	✓
Speed Sensitive Volume Control	—	✓

Power Feature

Feature	BMW	Mercedes-Benz
One-Touch Power Windows	4	4
Moonroof Type	1st Row Fixed Glass Extended	1st Row Power Glass Extended
Keyless Entry	✓	✓
Reverse Tilt Passenger Mirror	✓	✓
Heated Mirrors	✓	✓

Frontseats

Feature	BMW	Mercedes-Benz
Front Head Room	39.0 in.	42.1 in.
Front Leg Room	41.3 in.	41.4 in.
Front Shoulder Room	59.2 in.	59.6 in.
Seat Material: Premium Leather	✓	—
Front Seat Type: Sport	✓	—
Driver Seat Power Adjustments	12-way	12-way
Driver Seat Height Adjustment	✓	✓
Driver Seat Lumbar Support	Power	Power
Driver Seat Thigh Extension	✓	✓
Driver Seat Memory Settings	2	3
Passenger Seat Power Adjustments	12-way	12-way
Passenger Seat Height Adjustment	✓	✓
Passenger Seat Lumbar Support	Power	Power
Passenger Seat Thigh Extension	✓	✓
Driver Seat Heating	Multi-level	Multi-level
Passenger Seat Heating	Multi-level	Multi-level
Seat Material: Leather	—	✓
Front Seat Type: Bucket	—	✓
Passenger Seat Memory Settings	—	3
Driver Seat Ventilation	—	✓
Passenger Seat Ventilation	—	✓
Seat Massage Function	—	✓

Rearseats

Feature	BMW	Mercedes-Benz
Rear Head Room	37.5 in.	39.4 in.
Rear Leg Room	36.2 in.	43.8 in.
Rear Shoulder Room	56.9 in.	59.0 in.
Split-Folding Rear Seatback	✓	—
Folding Center Armrest	✓	✓

Tires and Wheels

Feature	BMW	Mercedes-Benz
Wheel Finish	Painted Alloy	—
Wheel Size	21 x 11.0 in.	19 x 8.5 in
Tire Type	Performance	—
Tire Size	295/35R21	255/45R19
Wheel Material	—	Alloy
Run Flat Tires	—	✓

Suspension

Feature	BMW	Mercedes-Benz
Four-Wheel Independent Suspension	✓	✓
Front Stabilizer Bar	—	✓
Rear Stabilizer Bar	—	✓

Warranty

Feature	BMW	Mercedes-Benz
Basic Warranty	4 yr./ 50000 mi.	4 yr./ 50000 mi.
Drivetrain Warranty	4 yr./ 50000 mi.	4 yr./ 50000 mi.
Hybrid Component Warranty	8 yr./ 100000 mi.	6 yr./ 62000 mi.
Corrosion/Rust Warranty	12 yr./ unlimited mi.	4 yr./ 50000 mi.
Roadside Assistance	4 yr./ unlimited mi.	4 yr./ 50000 mi.
Complimentary Scheduled Maintenance	3 yr./ 36000 mi.	—

Frequently Asked Questions

Common questions about comparing the 2026 BMW M5 and 2026 Mercedes-Benz S-Class.

How much more powerful is the BMW M5 compared to the Mercedes-Benz S-Class?

The 2026 BMW M5 is substantially more powerful, delivering 717 hp and 738 lb-ft of torque, which is a difference of 275 hp over the S-Class's 442 hp.

Which sedan is better for long-distance driving in terms of fuel economy?

The Mercedes-Benz S-Class is significantly better for long hauls, achieving 23 combined MPG, while the performance-focused M5 only manages 14 combined MPG.

Does the M5 offer any electric-only capability that the S-Class lacks?

Yes, the 2026 BMW M5 is a plug-in hybrid that provides an EPA-estimated electric range of 29 miles, a feature not listed for the standard S-Class model provided.

How do the size differences affect daily usability?

The S-Class is almost 9 inches longer (209.5 inches vs. 200.6 inches), which might make parking slightly trickier, although both are large sedans.

Is the starting price a significant factor in this comparison?

The difference is modest; the S-Class starts at $119,500, saving you $2,400 over the M5's $121,900 starting MSRP, making the running costs the bigger differentiator.