2021 Mercedes-Benz C-Class

The 2021 C-Class is the final model year of the facelifted W205 generation (the W206 was unveiled Feb 2021 and arrived as a 2022 model); the volume C300 uses a 2.0L turbo I4 rated at 255 hp without the later 48V mild hybrid.

C300's 2.0L turbo four produces 273 lb-ft; the AMG V6 and V8 variants deliver far more but are low-volume.

Mercedes quotes 5.7 s 0-60 for the volume C300 4MATIC sedan and 5.9 s for the rear-drive C300 — competitive for a four-cylinder compact luxury sedan.

The M264 2.0L turbo pulls strongly with little lag from low rpm, but its four-cylinder note is unremarkable and somewhat coarse when worked hard, and stop-start restarts are less seamless than in the later 48V W206.

The 9G-TRONIC 9-speed shifts smoothly and unobtrusively in daily driving with occasional hesitation on kickdown from a cruise; AMG models get a quicker-shifting AMG SPEEDSHIFT unit.

4MATIC AWD is available on the C300 and standard on the AMG C43; the AMG C63/C63 S sedans are rear-drive only in the US. No low range, as expected for the class.

Three distinct engines in 2021 — C300 2.0L turbo four, AMG C43 3.0L biturbo V6 and AMG C63/C63 S 4.0L biturbo V8 — but no hybrid, plug-in or EV option in the US sedan range.

EPA combined rating for the volume C300 4MATIC (2.0L turbo I4, 9-speed); the rear-drive C300 is also rated 27 MPG combined.

EPA city rating for the C300 4MATIC volume trim.

EPA highway rating for the C300 4MATIC volume trim; the RWD car manages 35 MPG.

Computed from the W205 C-Class US 17.4-gallon (66 L) fuel tank and the EPA 27 MPG combined rating for the C300.

EPA annual fuel cost at 15,000 mi/yr on premium for both C300 drivetrains; premium fuel compounds its middling MPG.

Every 2021 US C-Class sedan (C300, AMG C43, AMG C63/C63 S) requires premium unleaded; there is no regular-fuel, diesel or plug-in alternative.

The 2021 W205 C-Class sedan earns a 5-star NHTSA overall rating in both RWD and 4MATIC form; frontal is 4 stars (passenger side 4), side 5, rollover 4.

2021 IIHS Top Safety Pick+ with Good ratings in every crashworthiness test, including both small-overlap sides, but the award is conditional — it applies only to cars built after January 2021 with the optional front crash prevention and Exterior Lighting package.

The 2021 C 300 comes standard with Active Brake Assist (AEB) and Blind Spot Assist, but adaptive cruise, lane keeping/centering, rear cross-traffic and evasive steering are all in the extra-cost Driver Assistance Package — thin for a luxury car in 2021.

Vehicle-to-vehicle AEB is Superior with either system, but the standard system rates only Basic for pedestrians (failed to slow for the parallel adult); Superior pedestrian performance needs the optional package, and no nighttime pedestrian rating exists for this generation.

Blind Spot Assist (with exit warning) is standard, but active intervention (Active Blind Spot Assist) and rear cross-traffic alert/braking require the Driver Assistance Package.

Active Lane Keeping Assist and Active Steering Assist (lane centering) are well regarded and smooth in reviews, but both are optional; the standard car has no lane departure warning at all.

Active Distance Assist Distronic with stop-and-go, route-based speed adaptation and Active Steering Assist is among the more refined highway-assist combinations of its era, but it is optional rather than standard.

No hands-free driving is offered; Active Steering Assist requires hands on the wheel and warns after short intervals.

The volume C 300 with standard LED reflector lamps rates only Acceptable; Good requires Adaptive High Beam Assist or the Exterior Lighting package built after January 2021, and the same package built earlier rates Marginal.

Typical compact sport-sedan sightlines: decent forward view but a high rear deck and thick C-pillars; a rearview camera is standard and the surround-view camera is an option.

IIHS rates the LATCH hardware Good, with two full LATCH positions, but the W205's rear seat is tight, which makes rear-facing seats and three-across fits difficult.

Five-seat sedan with a 40/20/40-split folding rear bench; the center rear position is best for short trips.

Adequate front headroom for most adults but below mainstream-sedan norms; the standard sunroof on the C300 sedan eats into it.

Reasonable front legroom for the compact-luxury class, mid-pack against rivals.

Rear headroom matches the front figure and is competitive for a compact sedan, helped by a low-set rear cushion.

Tight rear legroom that is typical of the W205 and a known weakness against a 3 Series or mainstream mid-size sedans.

Small trunk for the class, though the 40/20/40 split rear seat adds pass-through flexibility.

Competitive everyday storage: covered center-console bin with sliding cupholder cover, door pockets and a 40/20/40 rear seat, but no standout innovations and small door bins.

Supportive, well-adjustable power front seats with standard memory, but the rear bench is low and short on thigh support.

The comfort-tuned W205 C300 with standard selective damping rides smoothly and composedly; AMG Line sport suspension and larger wheels firm it up.

A hushed, well-insulated cabin at highway speed by compact-sedan standards; the four-cylinder is the main audible intrusion under load.

Heated front seats became standard for 2021 alongside dual-zone climate; ventilated seats and a heated steering wheel are optional, and there is no rear climate zone.

The 2021 C 300 RWD sedan, the final model year of the facelifted W205 generation in the US, started at $41,600 before destination. KBB's original-MSRP figure of $42,650 is that price including the $1,050 destination charge.

The C 300 4MATIC is the volume configuration at $44,650 including destination. Most dealer stock carried the Premium package plus paint and wheel options, which puts a typically equipped car near $47,500.

Mercedes A/B dealer services are costly. Once the 4-year/50k warranty lapses, repair spend jumps in years 4–5, which puts the 5-year total near the top of the sedan band.

KBB currently values a 2021 C 300 sedan at about $20,800 private party against its $42,650 MSRP, which is roughly 48–49% retained at about 5 years. The car's value was held up by the 2021–22 used-car shortage, and that support has since faded.

The 2021 C-Class is covered by the Mercedes-Benz New Vehicle Limited Warranty for 4 years/50,000 miles, which is typical for the luxury segment.

Mercedes-Benz does not offer longer powertrain coverage, so the powertrain warranty ends with the 4-year/50k basic warranty. That falls below the bottom of the sedan band.

The 2021 C-Class includes no complimentary scheduled maintenance; buyers must purchase a Prepaid Maintenance plan. Roadside Assistance for the warranty term and a Mercedes me connect trial are included, while BMW, Genesis and Volvo rivals bundle 3 years of service.

$47,500 volume-trim price minus its estimated resale value after 5 years (48% retained, or about $22,800) leaves about $24,700 in depreciation. Add the projected $7,500 in 5-year maintenance and repairs, and owning this vehicle for 5 years costs about $32,200 in total.

In the US, 2021 is the final model year of the facelifted W205 generation (2015–2021), with the W206 not arriving until MY2022, so it benefits from seven years of running changes. J.D. Power rates its predicted reliability 81/100 ('Great'), while Consumer Reports rates late W205 C-Class reliability around average, so the two sources are mixed rather than jointly top-tier.

Mercedes-Benz sat at or below industry average in J.D. Power's Vehicle Dependability Study and in the lower half to lower third of Consumer Reports' brand reliability rankings around 2020–2022 — behind Lexus, Toyota, Mazda and BMW but ahead of Alfa Romeo, Land Rover and Jaguar.

Seven NHTSA campaigns cover the 2021 C-Class, mostly software fixes or multi-model sweeps (eCall location/SIM, rearview camera software, seat-belt retraction). The notable ones are a seat-position switch fault that could impair airbag/belt force-limiter activation and the 23V-445 fuel-pump shutdown (loss of drive power) — serious but not a repeated, generation-wide pattern like the early W206's electrical recalls.

The volume C 300 uses the M264 2.0L turbo four (255 hp, 48V belt starter-generator 'EQ Boost' in the facelift) with the 9G-Tronic automatic — both in wide service across the lineup since 2018/2013 with no systemic failure pattern. Owner complaints cite isolated engine, fuel-system and coolant-leak issues, and the fuel-pump recall reaches MY2021, keeping it off the top tier.

The W205 cabin was a class benchmark at launch — open-pore wood, metal trim, ambient lighting and the 2019 facelift's optional 12.3-inch digital cluster — and reviewers still rated it among the richest in the compact luxury class by 2021, though the tablet-style 10.25-inch screen and touchpad feel dated next to newer rivals.

As the last year of a mature generation, assembly is tight and consistent with few squeak/rattle complaints; the only MY2021 build-quality recalls are a seat-position switch contact and Cabriolet headrest mounting, both low-volume.

Mercedes-Benz USA has roughly 380 dealers across all 50 states, covering major metros and most secondary markets; luxury-brand service satisfaction is mid-pack against BMW, Audi and Lexus.

The W205 was a high-volume car for seven US model years, so parts supply and independent/aftermarket support are good, but Mercedes labor and OEM parts remain costly compared with mainstream sedans.

Standard 10.25-inch widescreen central display on every C-Class; no larger screen offered on the W205.

The pre-MBUX COMAND-era interface layers a rotary controller, optional touchpad and steering-wheel Touch Control Buttons; capable but menu-heavy and dated next to MBUX and iDrive 7.

Apple CarPlay and Android Auto are standard but wired only on the W205; wireless projection arrived with the 2022 W206.

Native navigation is optional (MB Entry Navigation or COMAND hard-drive nav in the Multimedia Package) and voice is command-based rather than MBUX's natural-language 'Hey Mercedes'.

Base system with FrontBass is only adequate, but the optional Burmester Surround Sound (Premium Package) is a well-regarded upgrade.

A 12.3-inch reconfigurable digital cluster became standard across the range for 2021.

Over-the-air capability is limited to online map updates with the navigation package; vehicle software updates are dealer-performed on the W205.

Mercedes me connect app provides remote start, lock/unlock and vehicle locate with a 3-year complimentary term; no phone-as-key.

Only dual front USB ports as standard; wireless charging is optional and rear-seat power is thin.

Push-button KEYLESS-START, app remote start and a hands-free power trunklid are provided; full KEYLESS-GO proximity entry is optional and no digital key is offered.

Rearview camera standard; Surround View, PARKTRONIC with Active Parking Assist and rear cross-traffic alert are in the optional Parking Assistance Package.

A head-up display is available as an option on the C300, though not standard on any volume configuration.

Good LATCH hardware on the outboard seats, but tight 35.2-in rear legroom, a low rear cushion and a 12.6 cu ft trunk make rear-facing seats and strollers a squeeze.

Five-star NHTSA and IIHS TSP+ credentials with standard AEB and blind-spot warning, but lane keeping, rear cross-traffic and the fuller assist suite require the Driver Assistance Package.

Quiet, smooth-riding cruiser, but the small trunk, tight rear legroom and absence of rear climate controls limit four-adult trips.

Smooth 9-speed automatic, compliant ride and strong low-end torque make it relaxed in traffic; engine stop/start can be noticeable.

27 MPG combined on required premium fuel and luxury-brand consumables make it pricier per mile than mainstream sedans, average for its class.

Compact 184.5-in footprint and ~36.7-ft turning circle are easy in town; surround view and active parking assist are optional.

A compact luxury sedan with no US tow rating and a small trunk; not meaningfully work-capable.

Luxury-oriented cabin materials and chassis not intended for hard use; no fleet/work reputation.

No onboard power outlets, tie-down or upfit provisions beyond a basic trunk.

Quiet, composed highway cruiser with ~470 miles of range; the capable DISTRONIC/Active Steering Assist suite is optional rather than standard.

4MATIC AWD helps on gravel and snow, but low ground clearance and no tow rating keep it pavement-bound.

Small 12.6 cu ft trunk is offset somewhat by the 40/20/40 folding rear seat for long items; no factory hitch.

Secure, composed rear-drive-based chassis with good grip, tuned for comfort rather than the sharpness of a 3 Series or Alfa Giulia.

Precise and well weighted but numb, with little road feedback.

Strong, consistent stops with a firm pedal; instrumented distance is competitive for the class.

Punchy 255-hp turbo four and a smooth, well-matched 9-speed automatic; stop/start restarts are noticeable.

The four-cylinder is well isolated at cruise but sounds coarse and uninspiring under load compared with six-cylinder rivals.

Tidy turning circle for a rear-drive-based compact sedan; mid-band for the segment.

Standard power seats with memory and power tilt/telescoping column give a good driving position; the rotary/touch-button control layout takes time to learn.

Quick and pleasant but a comfort-first luxury cruiser in C300 form; the AMG C43/C63 variants are the enthusiast choices.

The 2021 C 300 comes standard with LED headlights, power front seats, a 10.25-in central display with Apple CarPlay/Android Auto, and Active Brake Assist and Blind Spot Assist. Heated seats, the digital cluster, a 360 camera, adaptive cruise and Burmester audio are package options, leaving it sparer than a Genesis G70 and on par with the BMW 330i.

At $42,650–$44,650 with a 255-hp 2.0T, the C 300 is priced in line with the 330i and A4, but essentials sit in packages, and a well-equipped car tops $50k. The Genesis G70 and Acura TLX give more content per dollar.

The 2021 sedan runs from the C 300 (RWD or 4MATIC) to the AMG C 43 V6 and the AMG C 63 and C 63 S V8s, a four-step ladder with many package options. Coupe and cabriolet bodies share the range. No hybrid is offered.

The C-Class remained one of the top compact luxury sedans in US volume. However, 2021 sales fell sharply as the W205 wound down, chip shortages hit supply and buyers shifted to SUVs.

Mercedes-Benz is a top-tier aspirational luxury brand, and the C-Class is its core gateway sedan with a loyal following.

As an outgoing generation, the 2021 C 300 drew MBFS lease support and dealer discounts in the first half of 2021. Discounts dried up in the second half as the chip shortage cut inventory.

2021 is the seventh and final US model year of the W205 generation, which launched for MY2015 and was facelifted for MY2019. The all-new W206 was unveiled in February 2021 and arrived as a 2022 model, so buyers faced immediate obsolescence.

The late W205 was well reviewed for its refinement, ride and cabin quality. KBB named it the #2 Best Luxury Compact Car of 2021, but critics faulted its fussy controls, and it generally trailed the 3 Series and G70 in comparison tests.