A proper head-to-head in South Africa — compare price, performance,
fuel economy or electric range, safety and the details that shape long-term ownership.
S 350 d ISGDiesel Mild Hybrid9-Speed AutomaticCurrent
ZAR 2,571,121ex-showroom
⚡ 230 kW🔧 650 Nm⛽ 15.6 km/l
+Add a 3rd car
Decision summary
BMW M4 Convertible vs Mercedes-Benz S-Class: the short answer
S-Class has a modest catalogue-index lead, while M4 Convertible remains close.
M4 Convertible starts ZAR 241,121 cheaperM4 Convertible from ZAR 2,330,000 · S-Class from ZAR 2,571,121
Five key differences
Exact selected derivatives
Swipe sideways to compare every column
Specification
M4 Convertible
S-Class
Maximum Power
M4 Convertible390 kW
S-Class230 kW
Maximum Torque
M4 Convertible650 Nm @ 2750-5730 rpm
S-Class650 Nm
Engine Size
M4 Convertible2993 cc
S-Class2989 cc
Combined Fuel Economy
M4 Convertible12.5 km/l
S-Class15.6 km/l
Ground Clearance
M4 Convertible140 mm
S-Class130 mm
Strongest published figure in that row; no road-test winner is implied.
Independent editorial assessment
Hagalu editorial ratings
When a variant is selected, its rating out of five applies only to that exact derivative; a model-range review is not inherited. Editorial ratings are separate from the Specification Evidence Index out of 100 and are not customer ratings.
BMW M4 Convertible
M4 Competition Convertible AWD
Hagalu editorial rating
3.6/5★★★★★★★★★★
Desk research · Exact variant
Hagalu Editorial Team ·
Editorial assessment, not a customer rating. Not road-tested for this review.
Not yet rated means a complete review is not published; it does not mean the vehicle scored zero. Read the rating methodology.
What Each Car Gets Right (and Wrong)
M4 Convertible
Strengths
More powerful engine output
Weak Spots
Lower fuel efficiency
Fewer listed safety features
Lower published practicality figures
Best suited to:Published Performance
Specification evidence leader
S-Class
Strengths
Better fuel efficiency
Stronger listed safety equipment
Stronger published practicality figures
Weak Spots
Less powerful engine setup
Best suited to:Published EfficiencyPublished Practicality
Which One's Right for You?
M4 Convertible
Buyers prioritising the stronger published powertrain figures
S-Class
Buyers prioritising the lower published fuel or energy use
Buyers prioritising the more complete listed safety equipment
Buyers prioritising the stronger published space and capacity figures
Full Specs, Side by Side
Open a category, then swipe sideways to compare every column
Spec
M4 Convertible
S-Class
Model Introduced Year
2021
2026
Generation
G83 full-M soft-top convertible with M xDrive and body-specific roof and luggage packaging.
Current South African S-Class generation represented by derivative S 350 d ISG
Facelift History
Current updated G83-generation M4 Competition Convertible in the South African AWD configuration.
Current-generation/facelift specification; derivative-specific South African configuration
Facelift Launched Since
Original current-generation version
Current South African model cycle
Facelift Version Ending
Current
Current
Body Style
Convertible
Sedan
Model Year
2026
2026
Production Status
active
Current South African retail range
Segment
Premium Convertible
Premium sedan
Vehicle Type
Car
Sedan
Spec
M4 Convertible
S-Class
Length
4801 mm
5289 mm
Width
1887 mm
1954 mm
Height
1399 mm
1503 mm
Wheelbase
2857 mm
3216 mm
Ground Clearance (Default)
140 mm
130 mm
Ground Clearance (With Full Seating Load)
125 mm
120 mm
Fuel Tank Capacity
59 l
76 l
Boot/Cargo Space
385 l
550 l
Kerb Weight
2000 kg
2150 kg
Gross Vehicle Weight (GVW)
2345 kg
2000 kg
Payload Capacity
420 kg
670 kg
Towing Capacity
1600 kg
2000 kg
Seating Capacity
4 seats
5 seats
Number of Rows
2 rows
2 rows
Doors
2 doors
5 doors
Minimum Turning Radius
5.6 m
6.4 m
Front Headroom
987 mm
960 mm
Rear Headroom
947 mm
960 mm
Front Legroom
1036 mm
900 mm
Rear Legroom
890 mm
900 mm
Spec
M4 Convertible
S-Class
Engine
BMW turbocharged engine
2989/L6
Engine Code
B48
OM656M
Fuel Type
Petrol
Diesel Mild Hybrid
Hybrid System
Not Applicable
48V Mild Hybrid
Engine Displacement
2993 cc
2989 cc
Cylinders
6
6
Cylinder Layout
Inline
Inline
Valves
16
Not Officially Disclosed
Valves per Cylinder
4
4
Aspiration
Turbocharged
Turbocharged
Fuel System
Direct injection
Common-rail direct injection
Compression Ratio
10.5:1
15.5:1
Bore
82.0 mm
82.0 mm
Stroke
94.6 mm
94.3 mm
Maximum Power
390 kW
230 kW
Maximum Torque
650 Nm @ 2750-5730 rpm
650 Nm
Combined Power
Not Applicable
230 kW
Combined Torque
Not Applicable
650 Nm
Motor Type
Not Applicable
48 V integrated starter-generator
Number of Motors
Not Applicable
1
Motor Location
Not Applicable
Integrated with transmission / rear axle depending on hybrid system
Drive Type
RWD
RWD
Transmission
8-Speed Automatic
9-Speed Automatic
Top Speed
280 km/h
250 km/h
0-100 km/h
3.7 sec
5.6 sec
Quarter Mile
12.2 sec
15.0 sec
Drive Modes
Eco, Comfort, Sport
Comfort, Sport, Individual
Launch Control
No
No
Rev Limiter
7000 rpm
5000 rpm
Power-to-Weight Ratio
100 kW/tonne
Not Officially Disclosed
Torque-to-Weight Ratio
220 Nm/tonne
Not Officially Disclosed
Battery Capacity
Not Applicable
Not Officially Disclosed
Usable Battery Capacity
Not Applicable
Not Officially Disclosed
Battery Type
Not Applicable
0
Battery Voltage
Not Applicable
Not Officially Disclosed
Electric Range
Not Applicable
Not Applicable
AC Charging Power
Not Applicable
Not Applicable
DC Charging Power
Not Applicable
Not Applicable
AC Charging Time
Not Applicable
Not Applicable
DC Charging Time
Not Applicable
Not Applicable
Regenerative Braking
Not Applicable
No
Spec
M4 Convertible
S-Class
Gearbox
8-Speed Automatic
9G-TRONIC automatic
Drivetrain Layout
Rear-wheel drive
RWD
LSD Available
Not Applicable
No
Transfer Case
Not Applicable
Not Applicable
Differential Lock
Not Applicable
No
Paddle Shifters
Yes
Yes
Final Drive Ratio
Yes
Model-specific ratio; Hagalu Research Team reference
Number of Gears
8
9
Transmission Type
Automatic
9G-TRONIC automatic
Clutch Type
Yes
Torque converter
Gear Shift Indicator
Yes
Yes
Gear Shift Type
Automatic selector
Automatic with manual shift mode
Drivetrain
RWD
RWD
4WD Engagement
Not Applicable
No
4WD Hi Range
Not Applicable
0
4WD Lo Range
Not Applicable
0
4WD Selector
Not Applicable
No
Automatic Shift Paddles
Yes
Yes
Front Differential Lock
Not Applicable
No
Gearbox Type
Automatic
9G-TRONIC automatic
Low Range Ratio
Not Applicable
0
Low Range
Not Applicable
0
Axle Layout
Yes
Driven axle configuration: RWD
Rear Differential Lock
Not Applicable
No
Transmission Speeds
8
9
Spec
M4 Convertible
S-Class
Claimed Mileage
12.5 km/l
15.6 km/l
City Mileage
10.5 km/l
15.6 km/l
Highway Mileage
15.0 km/l
15.6 km/l
Fuel Tank Capacity
59 l
66 l
Emission Standard
Euro 6
Euro 6
AdBlue Tank Capacity
Not Applicable
23 l
Auto Start Stop
Standard
Yes
Real-world Mileage
12.5 km/l
15.6 km/l
Charging Port Type
Not Applicable
Not Applicable
Charging Type
Not Applicable
Not Applicable
Fuel Tank Litres
59
66
Combined Driving Range
Not Applicable
0
Electric Consumption
Not Applicable
0
Range Real World Highway
360 km
0 km
Range Real World Mixed
420 km
0 km
Spec
M4 Convertible
S-Class
Airbags
6
7
ABS
Standard
Yes
Electronic Stability Control
Standard
Yes
Traction Control
Standard
Yes
Hill Descent Control
Yes
No
Hill Start Assist
Standard
Yes
Child Safety Lock
Standard
Yes
ISOFIX Mounts
Standard
Yes
Brake Assist
Standard
Ventilated disc brakes
Tyre Pressure Monitor
Standard
Mercedes-Benz model-specific chassis equipment
Engine Immobiliser
Standard
Yes
Seatbelt Warning All Seats
Standard
Comfort seats with model-specific electric adjustment
Front Parking Sensors
Yes
Front and rear
AEB
Yes
Ventilated disc brakes
BA
Standard
Yes
Brake Override System
Yes
Ventilated disc brakes
Curtain Airbags
Yes
Yes
Driver Airbag
Yes
Yes
EBD
Standard
Yes
Engine Immobiliser
Standard
Yes
Hill Hold
Standard
Yes
Passenger Airbag
Yes
Yes
Rear Cross Traffic Alert
Yes
Yes
Seatbelt Pretensioners
Yes
Comfort seats with model-specific electric adjustment
Seatbelt Reminder
Standard
Comfort seats with model-specific electric adjustment
Side Airbags
Yes
Yes
Stability Control
Standard
Yes
TCS
Standard
Yes
Knee Airbag
Yes
Yes
ABS EBD
Standard
Yes
Spec
M4 Convertible
S-Class
Cruise Control
Yes
Adaptive cruise control
Adaptive Cruise Control
Yes
Yes
Lane Keep Assist
Yes
Yes
Lane Departure Warning
Yes
Yes
Blind Spot Monitoring
Yes
Yes
Rear Cross Traffic Alert
Yes
Yes
Parking Sensors
Yes
Front and rear
Rear View Camera
Yes
Yes
360 Degree Camera
Yes
Yes
Autonomous Emergency Braking
Yes
Ventilated disc brakes
Driver Fatigue Alert
Yes
Yes
Traffic Sign Recognition
Yes
Yes
Auto Highbeam
Standard
Yes
Auto Wipers
Yes
Rain-sensing automatic wipers
Rear Parking Sensors
Yes
Front and rear
Reverse Camera
Yes
Yes
Adaptive Cruise Control
Yes
Yes
Park Assist
Parking Assist Plus
Yes
Around View Monitor
Yes
Yes
Blind Spot Warning
Yes
Yes
Forward Collision Warning
Yes
Yes
Spec
M4 Convertible
S-Class
Seat Material
Leather 'Merino', with extended contents , Kyalami Orange/Black
Nappa leather
Heated Seats
Front
Front heated seats
Ventilated Seats
Front
Yes
Ambient Lighting
Yes
64-colour ambient lighting
Steering Wheel Material
Yes
Nappa leather multifunction steering wheel
60 40 Split Seat
Yes
Comfort seats with model-specific electric adjustment
Driver Seat Adjustment
Electric with driver memory
Electric adjustment with memory
Passenger Seat Adjustment
Electric multi-way
Electric adjustment with memory
Seat Trim
M Sport seats
Comfort seats with model-specific electric adjustment
Spec
M4 Convertible
S-Class
Climate Control
Standard
Multi-zone automatic climate control
Power Windows
Standard
Yes
Keyless Entry
Comfort Access
KEYLESS-GO
Push Button Start
Yes
Yes
Wireless Charging
Standard
Yes
Sunroof
Panoramic
Panoramic sliding sunroof
Electric Tailgate
No
No
Rain Sensing Wipers
Yes
Rain-sensing automatic wipers
AC Type
Standard
Multi-zone automatic climate control
Spec
M4 Convertible
S-Class
Infotainment System
Widescreen Display
MBUX multimedia system
Apple CarPlay
Yes
Wireless Apple CarPlay
Android Auto
Yes
Wireless Android Auto
Bluetooth Connectivity
Yes
Yes
Number of Speakers
6
13
Digital Instrument Cluster
BMW Live Cockpit Professional (includes head-up display)
12.3-inch digital instrument display
USB Ports
2
USB-C ports
Infotainment Screen
14.9
MBUX multimedia system
Touchscreen
14.9
MBUX multimedia system
Spec
M4 Convertible
S-Class
LED Headlamps
Standard
DIGITAL LIGHT / LED headlamps
Daytime Running Lamps
Standard
LED daytime running lights
Fog Lamps
Yes
Integrated LED all-weather lighting
Roof Rails
Yes
No
Exterior Colour Options
Multiple manufacturer colours
Mercedes-Benz model-specific exterior equipment
Headlights
Standard
DIGITAL LIGHT / LED headlamps
Panoramic Sunroof
Yes
Panoramic sliding sunroof
Spec
M4 Convertible
S-Class
Approach Angle
Not Applicable
Not Applicable
Departure Angle
Not Applicable
Not Applicable
Wading Depth
Not Applicable
Not Applicable
Terrain Modes
Not Applicable
Not Applicable
Locking Differential
Not Applicable
No
4WD System Type
Not Applicable
No
Breakover Angle
Not Applicable
Not Applicable
Spec
M4 Convertible
S-Class
Tyre Size
225/50 R18
275/45 R21
Front Brake Type
M Compound brake, red high-gloss
Ventilated disc
Rear Brake Type
M Compound brake, red high-gloss
Ventilated disc
Spare Wheel Type
Tyre repair kit
21-inch alloy wheels
Wheel Rim Size
19"/20" M forged wheels Double-spoke style 826 M Bicolour Black / MT
21
Handbrake Type
Electronic
Ventilated disc brakes
Spec
M4 Convertible
S-Class
Front Suspension
Adaptive M Suspension
Independent multi-link suspension
Rear Suspension
Adaptive M Suspension
Independent multi-link suspension
Spec
M4 Convertible
S-Class
CO2 Emissions
237 g/km
169 g/km
Spec
M4 Convertible
S-Class
Service Plan
5 years / 100000 km BMW Motorplan
5 Years / 100000 km
Spec
M4 Convertible
S-Class
Ownership Role
Enthusiast and executive
Displayed price includes 15% VAT; CO2 tax is separate where listed; five-year/100,000 km service and maintenance plan may be excluded.
Price Zar
2330000 ZAR
2571121 ZAR
Pricing Role
Current recommended retail price
Current South African retail price
Starting Price
2330000
3000000
Starting Price Zar
2330000
3000000
Spec
M4 Convertible
S-Class
Warranty
Yes
5 Years / 100000 km
In depth: how these cars differ
This M4 Convertible and S-Class comparison uses the exact derivatives selected above for South Africa. The catalogue index covers performance, efficiency, safety equipment, practicality and ownership cover only where comparable source-backed fields are present.
Performance index: M4 Convertible 97 vs S-Class 95.
Efficiency index: M4 Convertible 47 vs S-Class 64.
Safety-equipment index: M4 Convertible 92 vs S-Class 95.
Practicality index: M4 Convertible 53 vs S-Class 67.
Ownership-cover index: M4 Convertible not separately scored vs S-Class not separately scored.
These figures are Hagalu catalogue-comparison indicators, not customer ratings, crash-test scores, resale guarantees or a substitute for a road test. Each page shows its weighted source coverage beside the result.
Model imagery
M4 Convertible and S-Class image comparison
Open an image for its full canonical file or visit the model page for the complete vehicle record.
A transparent comparison of published catalogue fields. This is not a road-test score, owner rating or editorial review rating, and it appears only when every vehicle clears the same comparable-data threshold.
Evidence / 100
Evidence-index readout
S-Class leads by 8 points
S-Class has a modest catalogue-index lead, while M4 Convertible remains close.
Close catalogue match. Buyer priorities should decide the outcome.
Why this scoreView full breakdown
Evidence-index leader
S-Class
Performance
95/100
Efficiency
64/100
Safety
95/100
Practicality
67/100
M4 Convertible
Performance
97/100
Efficiency
47/100
Safety
92/100
Practicality
53/100
What the evidence means
Evidence indexMercedes-Benz S-Class
leads the specification evidence index with 82 pts
vs 74 pts for M4 Convertible
In Hagalu's specification evidence index, S-Class leads. However, M4 Convertible may suit buyers prioritising different confirmed fields. Ultimately, the right choice depends on your driving priorities in South Africa.
Related comparisons
Continue with closely related South Africa models and comparable body styles.
There is no universal winner. Use the comparison table to match the models and available derivatives in South Africa on price, safety equipment, space, powertrain and ownership cover. The category indicators summarise published catalogue data; they are not a road test or customer rating.
Compare the published consumption or mileage rows for the exact derivatives using the same unit and test basis. A catalogue figure is useful for like-for-like comparison, but traffic, speed, load, weather and driving style can change actual fuel use.
Compare only equipment explicitly listed for each derivative, including airbags, stability control and driver-assistance systems. Confirm the exact trim with the manufacturer, and treat any independent crash-test result separately because equipment and ratings can differ by market.
A reliable five-year total cannot be calculated from catalogue data alone. Add the exact purchase and finance cost, fuel or electricity, insurance quotes, scheduled servicing, tyres and expected resale value. Check whether the selected derivative includes a service or maintenance plan.
Use the seating, boot or load-space, ISOFIX and safety rows as a first check. Then test the exact cars with your child seats, passengers and typical luggage, because published dimensions do not show every access or comfort difference.
Compare the published power, torque and 0–100 km/h rows when they are available for both exact derivatives. Vehicle weight, gearing and power delivery also matter, so catalogue outputs alone do not establish real-world overtaking or response.
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