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Compare the2025 Mercedes CLAVS 2024 Lexus IS

2025 Mercedes CLA
2024 Lexus IS

Safety

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The CLA’s standard pretensioning seatbelts also sense rear collisions and remove slack from the seatbelts to help protect the occupants from whiplash and other injuries. The IS doesn’t offer a whiplash protection system.

To help make backing out of a parking space safer, the CLA has standard Rear Cross-Traffic Alert with Active Brake Assist, systems which detect vehicles approaching from the sides and can automatically apply the brakes to prevent a collision. Rear Cross-Traffic Braking costs extra on the IS.

The CLA’s driver alert monitor detects an inattentive driver then sounds a warning and suggests a break. According to the NHTSA, drivers who fall asleep cause about 100,000 crashes and 1500 deaths a year. The IS doesn’t offer a driver alert monitor.

Both the CLA and the IS have standard driver and passenger frontal airbags, front side-impact airbags, driver and front passenger knee airbags, side-impact head airbags, front and rear seatbelt pretensioners, four-wheel antilock brakes, traction control, electronic stability systems to prevent skidding, crash mitigating brakes, daytime running lights, blind spot warning systems, rearview cameras, rear cross-path warning, available all wheel drive, lane departure warning systems and around view monitors.

Warranty

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There are over 57 percent more Mercedes dealers than there are Lexus dealers, which makes it much easier should you ever need service under the CLA’s warranty.

Reliability

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A hardened steel chain, with no maintenance needs, drives the camshafts in the CLA’s engine. A rubber cam drive belt that needs periodic replacement drives the IS’ camshafts. If the IS’ belt breaks, the engine could be severely damaged when the pistons hit the opened valves.

Fuel Economy and Range

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On the EPA test cycle the CLA gets better mileage than the IS:

MPG

CLA

FWD

2.0 turbo 4-cyl.

26 city/36 hwy

AWD

2.0 turbo 4-cyl.

25 city/34 hwy

IS

RWD

5.0 V8

17 city/25 hwy

2.0 turbo 4-cyl.

21 city/31 hwy

3.5 DOHC V6

20 city/28 hwy

AWD

350 F Sport 3.5 DOHC V6

19 city/26 hwy

300 AWD 3.5 DOHC V6

19 city/26 hwy

Regenerative brakes improve the CLA’s fuel efficiency by converting inertia back into energy instead of wasting it. The IS doesn’t offer a regenerative braking system.

In heavy traffic or at stoplights the CLA’s engine automatically turns off when the vehicle is stopped, saving fuel and reducing pollution. The engine is automatically restarted when the driver gets ready to move again. If the conditions warrant or the driver wishes, the system can be manually disabled at any time for the duration of a trip. The IS doesn’t offer an automatic engine start/stop system.

Environmental Friendliness

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In its Green Vehicle Guide, the U.S. Environmental Protection Agency (EPA) rates the Mercedes CLA higher (6 out of 10) than the Lexus IS (5). This means the CLA produces up to 6.9 pounds less smog-producing pollutants than the IS every 15,000 miles.

Transmission

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The CLA offers a standard sequential manual gearbox (SMG). With no clutch pedal to worry about and a fully automatic mode, an SMG is much more efficient than a conventional automatic but just as easy to drive. The IS doesn’t offer an SMG or a conventional manual transmission.

Tires and Wheels

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Changing a flat tire near traffic can be dangerous and inconvenient. The run-flat tires available on the CLA can be driven up to 50 miles without any air pressure, allowing you to drive to a service station for a repair. The IS doesn’t offer run-flat tires.

Suspension and Handling

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The CLA has standard front and rear gas-charged shocks for better control over choppy roads. The IS base model’s suspension doesn’t offer gas-charged shocks.

The CLA’s drift compensation steering can automatically compensate for road conditions which would cause the vehicle to drift from side to side, helping the driver to keep the vehicle straight more easily. The IS doesn’t offer drift compensation steering.

For better handling and stability, the track (width between the wheels) on the CLA is 1.3 inches wider in the front and .5 inches wider in the rear than the average track on the IS.

Chassis

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The Mercedes CLA may be more efficient, handle and accelerate better because it weighs about 200 to 300 pounds less than the Lexus IS.

The design of the Mercedes CLA amounts to more than styling. The CLA has an aerodynamic coefficient of drag of .27 Cd. That is lower than the IS (.28 to .3) and many sports cars. A more efficient exterior helps keep the interior quieter and helps the CLA get better fuel mileage.

Passenger Space

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The CLA has .3 inches more front headroom, 1.7 inches more rear legroom and .6 inches more rear shoulder room than the IS.

Cargo Capacity

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The CLA has a larger trunk than the IS (11.6 vs. 10.8 cubic feet).

To make loading groceries and cargo easier when your hands are full, the CLA’s trunk can be opened just by kicking your foot under the back bumper, leaving your hands completely free. The IS doesn’t offer a hands-free gesture to open its trunk, forcing you to put cargo down if your hands are full.

Ergonomics

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The CLA’s standard easy entry and exit feature glides the driver’s seat back, making it easier for the driver to get in and out. An easy entry system costs extra on the IS.

The CLA offers an optional heads-up display that projects speed and navigation instruction readouts in front of the driver’s line of sight, allowing drivers to view information without diverting their eyes from the road. The IS doesn’t offer a heads-up display.

The power windows standard on both the CLA and the IS have locks to prevent small children from operating them. When the lock on the CLA is engaged the driver can still operate all of the windows, for instance to close one opened by a child. The IS prevents the driver from operating the other windows just as it does the other passengers.

The CLA’s standard Keyless-Go allow you to unlock the doors from any outside door handle, open the trunk, and start the engine, all without removing the key from the pocket or purse. Smart Access standard on the IS doesn’t offer a sensor on the rear doors, so you’ll have to reach a front handle to unlock the rear door.

The CLA’s power window, power lock, power mirror and cruise control switches are lit from behind, making them plainly visible and easier to operate at night. The IS’ cruise control switches are unlit, making them difficult to find at night and operate safely.

The CLA’s rain-sensitive wipers adjust their speed and turn on and off automatically based on the amount of rainfall on the windshield. This allows the driver to concentrate on driving without constantly adjusting the wipers. The IS’ standard manually variable intermittent wipers have to be constantly adjusted.

Heated windshield washer nozzles are optional on the CLA to prevent washer fluid and nozzles from freezing and help continue to keep the windshield clear in sub-freezing temperatures. The IS doesn’t offer heated windshield washer nozzles.

Both the Mercedes CLA and Lexus IS offer exterior mirrors that can be folded to provide convenience. The CLA features standard power folding mirrors, which allow for easy, one-touch folding or unfolding at the driver’s discretion. This provides added convenience when maneuvering or parking, as well as when walking past the parked vehicle. In comparison, the IS’ foldable mirrors are manual, requiring the driver to get out and physically fold them once parked and unfold them before getting in.

The Mercedes CLA has a standard Homelink wireless remote control system for garage door operation and device management, conveniently located on the rear view mirror. Homelink® eliminates the need for separate garage door openers and associated risks of losing, breaking, or having dead batteries. Lexus charges extra for Homelink® on the IS.

To quickly and conveniently keep personal devices charged without cables tangling and wearing out, the Mercedes CLA has a standard wireless phone charging system (Qi) in the front center console. The IS doesn’t offer wireless personal charging.

The CLA’s Active Parking Assist can parallel park or back into a parking spot by itself, starting, stopping and changing direction automatically. The IS doesn’t offer an automated parking system.

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