Tuesday, September 6, 2011

Mercedes A-Class

The Mercedes-Benz A-Class is a mini MPV produced by the German automaker Mercedes-Benz. The first generation (W168) was introduced in 1997, and the all-new second generation model (W169) appeared in late 2004. It is available as a three or five-door mini MPV. It is Mercedes' entry level model in most of its worldwide markets, though not in North America or India; the B-Class is the entry model in China, South Korea, Canada, Australia and Mexico, and the C-Class is the entry model in the US and India.

Mercedes A Class Specification

Production of the W168 A-Class began in 1997. Its front engine, front wheel drive layout was quite unusual for Mercedes. To date, about 1.6 million units have been sold worldwide.

One innovation of the W168 was a frontal-impact absorption system called the "Sandwich" (see patents DE4326 9 and DE4400132 in the name of Mercedes-Benz). In the event of a violent frontal impact, the engine and transmission would slide underneath the floor below the pedals rather than entering the passenger compartment.

The W168 became infamous in 1997 after flipping over during the traditional "moose test" performed by the Swedish automobile publication Teknikens Värld. According to the report, the W168 overturned when maneuvering to avoid the "moose". Mercedes initially denied the problem, but then took the surprising step of recalling all units sold to date (2,600) and suspending distribution until the problem was solved by adding electronic stability control and modifying the suspension.

2009 Mercedes A Class Special

Driving assistance
The car is designed according to Mercedes-Benz concept of 'Touch And Feel' (TAF).

The multi-function steering wheel places controls for the radio, telephone, and other systems conveniently within reach of the thumbs of the driver. Power steering (standard feature) aids control of the automobile, with its behaviour varying according to the vehicle's speed.

The Mercedes COMAND APS is a navigation system which provides directions via GPS. The radio unit also provides DVD and telephone functionality, with various versions available (standard Audio 20 radio/single CD, Audio 50 APS or COMAND APS).

The Parktronic system provides audio and visual signals to indicate how far the car is from an obstacle.

The A-class optionally includes a "Light & Sight" package which includes bi-xenon HID headlamps with gas-discharge bulbs; cornering lights (main-beam headlamps at road junctions and tight corners); "Headlamp Assist, which automatically turns on the lights when needed; and a rain sensor that adjusts wiper speed depending on rainfall intensity.

As a standard feature, when entering a tunnel or an underground garage the car goes into "tunnel mode", where all windows and the panoramic sliding sunroof are closed.

Mercedes A-Class Interior

Temperature control
The standard temperature control system has separate temperature settings for driver and front passenger sides, and includes a "Heater Booster System" that can flood the interior of the car with hot air.

The optional Themotronic system maintains and regulates the temperature in accordance with a set of sensors that measure temperature, sunlight, humidity and pollutant levels in the ambient air.

A number of new features were made available in the W169 model.

The biggest was the immediate fitment of a newly invented device, Electronic Stability Control. ESP is standard on every Mercedes-Benz (produced after 1999).

The car is constructed with high-strength steel alloys with bonded joints. It has a large number of airbags including optional rear side airbags (for side-impacts in the backseats), optional side-curtain airbags, and standard head and thorax-protection side airbags. The front airbags are adaptive with two-stage gas generators operating according to the severity of accident.

The force exerted by the seat belt system during a collision adapts dynamically depending upon the collision characteristics. The 'active' head restraints (standard for driver and front passenger) give enhanced protection from neck injury, especially during rear collisions.

The angle of the A-pillar is flatter than the windshield angle.

Mercedes A-Class Interior

Passenger and cargo space

The cargo capacity of the W169 was increased by 15 percent compared with the W168. The seats can be moved and configured in various ways:
EASY-ENTRY: Front seats slides forwards with the backrest folded forwards to afford the rear seat passengers more room for getting in and out. (standard on three-door)
EASY-VARIO: Both rear-seat cushion sections are folded forward, while the luggage compartment floor can be set to one of two different heights. (standard on five-door; optional on three-door)
EASY-VARIO-PLUS: Both rear-seat cushion and the front passenger seat are folded forward. Increases load capacity to as much as 1995 litres. (optional on five-door)

Engine and drive system 
The 200 Turbo version is characterized by its dual exhaust

Seven types of motors are available, and all are four-cylinders: four petrol (gasoline) (A150, A170, A200, A200Turbo) and three diesel (160CDI, 180CDI, 200CDI) partnered with either 5 or 6-speed manual gearbox. A continuously variable transmission system called "Autotronic Constantly Variable Transmission" (CVT) is an optional feature.

The petrol A200 Turbo provides 193 hp (144 kW) and 280 N·m (207 lb·ft) of torque (rotational force); the diesel A200 CDI has 140 hp (104 kW) and 300 N·m (221 lb·ft).

It is estimated that the W169 engines provide a 40% increase in power and a 10% decrease in fuel consumption compared to W168 engines.

Mercedes A-Class

The most powerful model can take the car from a standstill to 100 km/h (62 mph) in 8.0 seconds, and has a top speed of 218 km/h (135 mph). The newly developed direct-injection CDI diesel units use a common-rail direct injection system that improves fuel consumption and reduces exhaust emissions and noise levels.

All the engines meet the tight EU4 emissions limits. A particulate filter system is available as an option for the diesel units which reduces the particulate emissions by about 99% without the need for additives.

The A-Class is a front wheel drive car and features traction control (ASR) as standard, as well as electronic stability control and anti-lock brakes (ABS).

Handling is improved by precision tracking and anti-roll support, and by a Parabolic Rear Axle.

A "Selective Damping System", in which the shock absorber forces respond differently according to conditions, is standard. For example, under normal conditions it operates at soft absorption; while cornering at speed it changes to full damping force.

The W169 optionally comes with light-alloy wheels, with a run-flat feature, Tirefit tire sealant and a tire-pressure-loss warning device.

Tire sizes are:
185/65 R 15 with wheel trim (classic model)
185/65 R 15 light-alloy wheels (elegance model)
195/55 R 16 light-alloy wheels (avantgarde model)

Mercedes A-Class

The 2009 A-Class (W169 Facelift, shown in the spring of 2008 and on the road that year) features redesigned front and rear bumpers, new tail lamps and headlights, new grille, new exterior mirrors, a restyled interior design and new upholsteries and colors. The 2009 A-Class was released alongside the refreshed 2009 M-Class and B-Class. The car is also available with Active Park Assist, which enables the car to parallel park itself, with only throttle and brake inputs required from the driver.

Production of the W169 facelift will begin in June 2011, for introduction as a 2012 model.

It has been reported in the press that a successor to the W169 will be launched during 2011 and will feature a significantly different body design more akin to that of cars like the Volkswagen Golf rather than continuing the "tall but small" sandwich floor design of the first two generations of A-Class. This would move the A-class into small family car class rather than staying in the supermini class..

Mercedes A-Class

The Mercedes A-Class E-Cell was introduced in September 2010 and debuted at the October 2010 Paris Motor Show. The E-Cell has a range of 200 kilometres (124.3 mi) capable of developing a peak output of 70 kW (94 hp), a continuous power rating of 50 kW (67 hp) and a maximum torque of 290 N·m (214 lb-ft). The Mercedes A-Class E-Cell can accelerate from 0-60 km/h (37 mph) in 5.5 seconds, and its top speed is 150 kilometres per hour (93 mph).

Tesla Motors, as part of its collaboration with Mercedes-Benz, is building electric powertrain components for the E-Cell. The 36 kW battery contains approximately 4,000 individual lithium-ion cells.

Mercedes has developed a modular system for electric vehicles with battery and fuel-cell. This system allows the efficient use of shared parts in all the brand's electric vehicles. Thanks to the modular approach the electric drive of the A‑Class E‑Cell is also used in the B‑Class F‑Cell, and the energy storage units in the A‑Class EV are the same as the battery in the Smart fortwo electric drive.

A limited production of 500 A-Class E-Cell electric cars will be built, for trial purposes, at the Mercedes Rastatt plant, near Stuttgart beginning in September 2010. As part of a demonstration program, the cars will be leased to selected customers in several European countries, including Germany, France, and the Netherlands. Daimler is not planning to sell the electric version outside of Europe.

A200 normal aspiration
Displacement: 2034 cc
Power: 136 PS (100 kW; 134 hp) @ 5750 rpm
Rated Torque: 185 N·m (136 ft·lbf) @ 3500 rpm - 4000 rpm
Transmission: 7-speed Auto CVT
Top Speed: 195 km/h (121 mph)
Wheels: 6j x 16
Tires: 195/55 R16

Production    2004–present
  • Kecskemét, Hungary
  • Rastatt, Germany
  • Thonburi, Thailand (TAAP)
Body style    
  • 5-door mini MPV
  • 3-door mini MPV
Layout    FF layout
Platform    Mercedes-Benz W169
  • 2.0L Diesel I4
  • 1.5L I4
  • 1.7L I4
  • 2.0L I4
  • 5-speed manual
  • 6-speed manual
  • CVT
  • 2004-08: 3,838 mm (151.1 in)
  • 2009- 3,883 mm (152.9 in)
Width    1,764 mm (69.4 in)
Height    1,593 mm (62.7 in)

No comments:

Post a Comment