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Both the Quattroporte and the CLS-Class have standard driver and passenger frontal airbags, front side-impact airbags, side-impact head airbags, front and rear seatbelt pretensioners, height-adjustable front shoulder belts, traction control and electronic stability systems to prevent skidding.
The Quattroporte has a standard cap-less fueling system. The fuel filler is automatically opened when the fuel nozzle is inserted and automatically closed when it’s removed. This eliminates the need to unscrew and replace the cap and it reduces fuel evaporation, which causes pollution. The CLS-Class doesn’t offer a cap-less fueling system.
For better ride, handling and brake cooling the Quattroporte has standard 19-inch wheels. Smaller 18-inch wheels are standard on the CLS-Class. The Quattroporte’s optional 21-inch wheels are larger than the 19-inch wheels optional on the CLS-Class.
For a smoother ride and more stable handling, the Quattroporte’s wheelbase is 11.6 inches longer than on the CLS-Class (124.8 inches vs. 113.2 inches).
For better handling and stability, the track (width between the wheels) on the Quattroporte is 1.4 inches wider in the front and .7 inches wider in the rear than on the CLS-Class.
Because it has more passenger and cargo room, the Quattroporte is rated a Large car by the EPA, while the CLS-Class is rated a Compact.
The Quattroporte has standard seating for 5 passengers; the CLS-Class can only carry 4.
The Quattroporte has 22 cubic feet more passenger volume than the CLS-Class (114 vs. 92).
For enhanced passenger comfort on long trips the Quattroporte’s available rear seats recline. The CLS-Class’ rear seats don’t recline.
The Quattroporte has a much larger trunk than the CLS-Class (18.7 vs. 15.3 cubic feet).
The Quattroporte offers a remote vehicle starting system, so the vehicle can be started from inside the driver's house. This allows the driver to comfortably warm up the engine before going out to the vehicle. The climate system will also automatically heat or cool the interior. The CLS-Class doesn’t offer a remote starting system.
The Quattroporte’s instruments include an oil pressure gauge and a temperature gauge – which could save your engine! Often ‘idiot lights’ don’t warn you until damage has been done. The CLS-Class does not have an oil pressure gauge.
In poor weather, headlights can lose their effectiveness as grime builds up on their lenses. This can reduce visibility without the driver realizing. The Quattroporte has standard headlight washers to keep headlight output high. The CLS-Class doesn’t offer headlight washers.
The Quattroporte offers an optional 115-volt a/c outlet on the center console, allowing you to recharge a laptop or run small household appliances without special adapters that can break or get misplaced. The CLS-Class doesn’t offer a house-current electrical outlet.