4MATIC
Encyclopedia
Four-wheel drive
Four-wheel drive, 4WD, or 4×4 is a four-wheeled vehicle with a drivetrain that allows all four wheels to receive torque from the engine simultaneously...
system developed and used by Mercedes-Benz
Mercedes-Benz
Mercedes-Benz is a German manufacturer of automobiles, buses, coaches, and trucks. Mercedes-Benz is a division of its parent company, Daimler AG...
. It is designed to increase traction in slippery conditions.
Almost all Mercedes-Benz vehicles featuring this system have an automatic transmission
Automatic transmission
An automatic transmission is one type of motor vehicle transmission that can automatically change gear ratios as the vehicle moves, freeing the driver from having to shift gears manually...
as standard equipment (except 260 and 300 gasoline and aspirated 300 D were standard with manual transmission); the name is derived from 4-wheel drive and automatic. The first design of 4Matic system was introduced in 1986 on the W124
Mercedes-Benz W124
W124 is the Mercedes-Benz internal chassis-designation for the 1985 to 1995 version of the Mercedes-Benz E-Class. The W124 models replaced the W123 models after 1985 and were superseded by the W210 E-Class after 1995.-History:...
series (E Class) saloons (four door) and estate (station wagon) cars. It was available with the 2.6 L and 3.0 L 6 cylinder petrol (gasoline) and diesel engines.
Some newer versions of 4Matic are true AWD as the system remains active at all times. Sophisticated engine management and ABS systems control the amount of torque transferred to each wheel allowing the system to be effective at any speed.
The first generation 4Matic system was originally a complex electronically controlled system with automatically engaging four-wheel drive
Four-wheel drive
Four-wheel drive, 4WD, or 4×4 is a four-wheeled vehicle with a drivetrain that allows all four wheels to receive torque from the engine simultaneously...
(4WD), the system employs locking central and rear differentials to provide additional traction in slippery conditions. The centre differential, also known as the transfer case, contains two clutches. Each hydraulically enabled clutch is controlled separately to allow for three modes of operation: 2WD (mode 0) where 100% of available torque is available to the rear axle while the front axle is disconnected, and two 4WD modes which allow for 35/65 front/rear axle torque split (mode 1) or 50/50 front/rear axle torque split (mode 2). The rear differential lock, previously known as ASD on Mercedes-Benz models, can also be locked (mode 3) if rear wheel slip is still present when the transfer case 50/50 4WD mode 2 is engaged. Due to safety and stability concerns there is no front differential lock. The 4Matic system uses inputs from the three channel ABS system and a steering wheel angle sensor to decide when to intervene. 4WD is disengaged automatically if the ABS
Anti-lock braking system
An anti-lock braking system is a safety system that allows the wheels on a motor vehicle to continue interacting tractively with the road surface as directed by driver steering inputs while braking, preventing the wheels from locking up and therefore avoiding skidding.An ABS generally offers...
service brakes are applied. Engine throttle control is not inherent in the W124 system. Two W124 variants of the 4Matic system were produced: the first system (1986–1991) used a mechanical pressure test lever to disable the system hydraulically while the second system variant (1992/1993) used an electrical test switch to break power to the system. The latter system variant when in test mode allows for continued operation of the rear shock self-levelling system (SLS) when installed. Plagued with reliability problems at first, the multi-plate clutch central differentials were prone to failure; it was withdrawn in 1993.
The four wheel drive system was developed in conjunction with Steyr-Daimler-Puch
Steyr-Daimler-Puch
Steyr-Daimler-Puch was a large manufacturing conglomerate based in Steyr, Austria, which was broken up in stages between 1987 and 2001. The component parts and operations continued to exist under separate ownership and new names.-History:...
(now Magna Steyr
Magna Steyr
Magna Steyr Fahrzeugtechnik AG & Co KG is an automobile manufacturer based in Oberwaltersdorf, Austria, with its primary manufacturing location in Graz...
), who manufactured the Mercedes-Benz G-Class
Mercedes-Benz G-Class
The original 460-series Geländewagen went on sale for civilian buyers in 1979, after having debuted in February of that year. It was offered with two wheelbases, a short wheelbase of 2,400 mm and a long one of 2,850 mm. One could choose between three body styles: A two-door short...
in Austria. The second generation of 4Matic was re-introduced on the W210 series
Mercedes-Benz W210
The Mercedes-Benz W210 is a mid-size luxury car–executive car which was produced by the German automaker Mercedes-Benz from 1995 through 2002 . The W210 replaced the W124 model. They were sold under the E-Class model names in both sedan and station wagon body types...
in 1998/1999. Available only in left hand drive the cars were again manufactured at the Magna-Steyr plant in Austria. The second generation of 4Matic used a full time 4 wheel drive system with three open differentials front, centre and rear. Traction control
Traction control system
A traction control system , also known as anti-slip regulation , is typically a secondary function of the anti-lock braking system on production motor vehicles, designed to prevent loss of traction of driven road wheels...
is achieved using ETS (Electronic Traction System). This employs the ABS system with additional valves to monitor and then partially brake any wheel which loses traction. This much simpler system is also used in the Mercedes-Benz M-Class
Mercedes-Benz M-Class
The Mercedes-Benz M-Class is a luxury mid-size sport utility vehicle , first offered in 1997 as a 1998 model, and built by the German automaker Mercedes-Benz. Gradually, the M-Class became a sales success in the United States and Mexico. In terms of size, it is slotted in between the smaller...
SUV.
The second and third generation 4Matic systems are currently available on the E-Class
Mercedes-Benz E-Class
The Mercedes-Benz E-Class is a range of executive-size cars manufactured by Mercedes-Benz in various engine and body configurations. The E initially stood for Einspritzmotor, ; a new feature in volume production vehicles at the time that the E-Class first appeared, with the E as a suffix to the...
, C-Class
Mercedes-Benz C-Class
The Mercedes-Benz C-Class is a compact executive car produced by the Mercedes-Benz division of Daimler AG. First introduced in 1993 as a replacement for the 190 range , the C-Class was the smallest model in the marque's lineup until the 1997 arrival of the A-Class...
, R-Class
Mercedes-Benz R-Class
The R-Class is a multi-purpose vehicle offered by Daimler AG in 2006 model year under the Mercedes-Benz brand. It is the first full-sized multi-purpose vehicle ever produced by Mercedes-Benz...
, S-Class
Mercedes-Benz S-Class
The Mercedes-Benz S-Class is a series of luxury sedans produced by Mercedes-Benz, a division of Daimler AG. The classification was officially introduced in 1972 with the W116 S-Class, which succeeded previous Mercedes-Benz models dating to the mid-1950s...
, Viano and the entire Mercedes-Benz SUV range. These latter systems include engine and automatic stability controls.
See also
- W124 Mercedes-Benz E Class (1985–1995)
- quattro (four wheel drive system) - the famed system from AudiAudiAudi AG is a German automobile manufacturer, from supermini to crossover SUVs in various body styles and price ranges that are marketed under the Audi brand , positioned as the premium brand within the Volkswagen Group....
- 4motion4motion4motion is a registered trademark of Volkswagen AG, used exclusively on Volkswagen-branded automobiles which utilise four-wheel drive systems. Volkswagen has previously used the term "Syncro" for its 4WD models....
- VolkswagenVolkswagenVolkswagen is a German automobile manufacturer and is the original and biggest-selling marque of the Volkswagen Group, which now also owns the Audi, Bentley, Bugatti, Lamborghini, SEAT, and Škoda marques and the truck manufacturer Scania.Volkswagen means "people's car" in German, where it is...
branded four wheel drive system - Locking differentialLocking differentialA locking differential, diff-lock or locker is a variation on the standard automotive differential. A locking differential may provide increased traction compared to a standard, or "open" differential by restricting each of the two wheels on an axle to the same rotational speed without regard to...
provides additional information on differentials. - S-AWC - a torque vectoring four-wheel drive system from Mitsubishi MotorsMitsubishi Motorsis a multinational automaker headquartered in Minato, Tokyo. In 2009 it was the fifth-largest Japan-based automaker and the 17th-largest in the world measured by production...