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2020 Mercedes-Benz C-Class C 300 Cabriolet

All Mercedes-Benz C-Class W205 trims (2015–2021) → All Mercedes-Benz C-Class generations →
2020 Mercedes-Benz C-Class – front Unverified
Photo: Mercedes-Benz C-Class W205 FL silver (2) by Damian B Oh, CC BY-SA 4.0, via Wikimedia Commons
Photos show the fourth generation (facelift) (W205, 2015–2021); trim, color, and model year may differ.
All photo credits
  1. Photo: Mercedes-Benz C-Class W205 FL silver (2) by Damian B Oh, CC BY-SA 4.0, via Wikimedia Commons
  2. Photo: 2018 Mercedes-Benz C-Class C220d Avantgarde by Chanokchon, CC BY-SA 4.0, via Wikimedia Commons
  3. Photo: MERCEDES-BENZ C-CLASS LWB SEDAN (W205) China (32) by Dinkun Chen, CC BY-SA 4.0, via Wikimedia Commons
  4. Photo: Mercedes C-Klasse (C200) Photo 2020 Free image (49647518481) by Autobilder Gratis, CC BY 2.0, via Wikimedia Commons
  5. Photo: Mercedes Benz C 2018 interior at Legendy 2018 in Prague by Jiří Sedláček, CC BY-SA 4.0, via Wikimedia Commons

The 2020 Mercedes-Benz C-Class C 300 Cabriolet is a 255-hp 2.0-liter turbocharged inline-4 convertible with a 9-speed automatic and rear-wheel drive. It starts at $53,950 MSRP and is rated at 24 mpg combined.

It makes 255 horsepower at 5,800 rpm and 273 lb-ft of torque at 1800-4000 rpm, spinning to a 6,500 rpm redline. EPA fuel-economy estimates are 21 mpg city and 29 mpg highway (24 mpg combined).

The C-Class measures 184.5 inches long on a 111.8-inch wheelbase and has a curb weight of 3,869 lb.

Spec Value
Vehicle
Body TypeConvertible
PowertrainGas
Price
MSRP$53,950
MSRP with Destination$54,945
Destination Charge$995
Engine
Engine TypeInline-4 Turbo
Displacement1.991 L
Horsepower255 hp @ 5,800 rpm
Torque273 lb-ft @ 1800-4000 rpm
Redline6,500 rpm
ValvetrainDOHC, 4-valves per cylinder
Bore and Stroke83.0 x 92.0
Compression Ratio10.5:1
Drivetrain
Drive TypeRWD
Transmission
Transmission9-Speed Automatic (9G-TRONIC)
1st Gear5.35
2nd Gear3.24
3rd Gear2.25
4th Gear1.64
5th Gear1.21
6th Gear1
7th Gear0.86
8th Gear0.72
9th Gear0.6
Reverse4.8
Fuel Economy
City21 MPG
Highway29 MPG
Combined24 MPG
Tank Capacity17.4 gal
Suspension
Front SuspensionIndependent multi-link, coil spring, single-tube shock w/ CDC, torsion bar
Rear SuspensionIndependent multi-link, coil spring, single-tube shock w/ CDC, torsion bar
Turning Diameter36.8 ft
Brakes
Front Brake Disc13.0"
Rear Brake Disc11.8"
Tires & Wheels
Wheels Front7.5 x 18 Cast
Wheels Rear8.5 x 18 Cast
Tires Front225/45 R18
Tires Rear245/40 R18
Dimensions & Weight
Length184.5 in
Width71.3 in
Height55.5 in
Wheelbase111.8 in
Front Track61.7 in
Rear Track61.1 in
Ground Clearance3.5 in
Cargo Volume8.83 ft³
Curb Weight3,869 lbs
Interior
Headroom Front38.4 in
Headroom Rear36 in
Shoulder Room Front54.8 in
Shoulder Room Rear47.8 in

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Safety & Recalls

NCAP safety ratings

Tested, but no star ratings were published (2020 Mercedes-Benz C-Class 2 DR RWD).

Recalls

No recalls on file with NHTSA for the 2020 Mercedes-Benz C-CLASS.

46 owner complaints to NHTSA for the 2020 Mercedes-Benz C-CLASS

Owner Complaints

46 owner complaints filed with NHTSA for the 2020 Mercedes-Benz C-CLASS (5 mention a crash, 4 an injury). See all on nhtsa.gov

Most-cited areas
Engine9
Power Train7
Unknown Or Other7
Structure5
Back Over Prevention4
Electrical System4
A complaint can cite more than one area.
Most recent complaints
Aug 2, 2026 · Structure 1 injury
“I own a 2020 Mercedes-Benz C300 equipped with a power trunk. On July 22, 2026, I took my vehicle to Annapolis Mercedes-Benz because the power trunk was repeatedly closing on its own while people were…”
Jul 1, 2026 · Structure
“Automatic trunk closing mechanism caused the trunk hood to close on my head as I was putting groceries in the trunk. This has occurred several times in the past but this time it hit my head with more…”
Apr 23, 2026 · Power Train, Electrical System, Engine
“Vehicle has ongoing and recurring electrical and engine-related defects that affect safe operation. The primary systems involved are the electrical system, engine ignition system, and powertrain. The…”
Apr 16, 2026 · Vehicle Speed Control, Engine
“The contact owns a 2020 Mercedes-Benz C300. The contact stated that while at a stop, the vehicle failed to accelerate as intended. There was no warning light illuminated. The dealer was not contacted…”
Apr 3, 2026 · Electrical System
“Car stops accelerating and shifts into neutral without warning I nearly got hit from behind. I have consulted several other Mercedes vehicle owners and all had the same issue. Two of the other owners…”

Complaints are unverified reports submitted to NHTSA by owners. They cover the whole model year, not a specific trim, and a count alone doesn't show how common a problem is.

Source: US National Highway Traffic Safety Administration (nhtsa.gov), matched as 2020 MERCEDES-BENZ C-CLASS. US-market vehicles only; data cached for up to 7 days.

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