4MATIC All Wheel Drive | EClassBenz com

16 Июн 2015 | Author: | No comments yet »
Mercedes Benz s63 amg 4matic

The Early 4Matic: 1987-1993

The generation 4Matic sold in the ’90s is a part-time all wheel system. In normal driving with no wheel slippage, the directs all power to the rear When the computer detects wheel spin, it activates a of clutches that engage and in the front axles for more When braking, the system disengages the front axle to interference with the anti-lock

This system does not in any way wheel spin or keep the car once moving. It only on the front wheels after the wheels lose grip. this system waits for slippage to occur before the front wheels, it is a reactive

The only advantage of this is that its complete disengagement preserves the rear wheel handling dynamics in dry conditions.

The of this reactive system are (1) When the AWD is not in use (which is most of the the car lugs around more 200 lbs of extra … weight in the all drive system. This gas mileage. (2) The system does not the car’s stability. It only the car unstuck after a brief lag for engagement. (3) The complicated electrical and parts leak and break often.

The New 4Matic: 1998-Present

For the new 4Matic Mercedes tossed out the old 4Matic and contracted German engineering Magna Steyr to build a new from scratch. The new system just like an extended of a typical rear wheel car. It adds little which means that unlikely to break.

Here’s how it All rear wheel drive have a rear differential splits torque between the left and back right To the base E-class design, the system adds a front that splits torque the front left and front wheels. A center differential splits torque between the (35%) and rear (65%). system does not involve any clutches or differential locks could wear out or cause

It is on all the time, which means it prevents wheel slip and stability. Because of this, the new system is a full-time, proactive

But it’s also reactive to slip. On an ordinary two wheel car without differential locks, if one wheel loses traction, the car move. For an all wheel drive car locks, the situation worsens. If any of the wheels lose grip, the car stuck. To solve this Mercedes used the same as a two wheel drive car: traction control. Electronic control gently brakes the that slips, causing the to send power to the wheels grip. Theoretically, the 4Matic can move the car even if only one has traction.

Practical Matters

Is really necessary?

Probably even in snowy climates, that you use snow tires in the . Remember that all wheel does not help the car brake or any better. All cars have wheel brakes!” All wheel only accelerates you more All that traction when can make you overconfident when or braking.

The all wheel drive system about 200 pounds. It takes to stop a heavier vehicle a lighter one. In snow, the takes about 10 feet to stop — which could be the between an accident and rear-ending

Although you can make it through to your destination with wheel drive and snow the 4Matic will get you there any fuss or drama. If you have tires, ESP (that’s electronic control, not extra-sensory perception!), and your car will be heavy snow tank. Only clearance can stop you!

the 4Matic hurt gas mileage or

The impact on gas mileage is minimal — a 1 MPG drop. 0 to 60 times increases by a quarter second. Directional is improved by all wheel drive.

I be concerned about reliability the 4Matic?

No. The 4Matic adds no new parts. two extra differentials. The traction system is already used on the rear wheel drive The difference in reliability between and rear wheel drive is to the difference in reliability between a cylinder and an eight cylinder. a non-issue.

How does 4Matic resale value / purchase

Since all wheel drive is so the 4Matic option adds $2,000 to the purchase price of a E-class, especially in the snow 4Matic cars have their value better their garden variety RWD They will probably to comand a price premium in the

William Percival

I have a that has a 4Matic C300.  A tire was recently damaged repair.  The other appear to be in very good with no signs of differential

He is being told by a tire that all four tires to be replaced.  I am seeing some supporting this when I the Internet. The rationale is based on the to have 4 wheels on the car with the circumference.


On one hand this makes sense to me based on how I generally how power is distributed in drive like this.  On the other it seems very intolerant, in the event that tires differentially over time.

back to my original point, the three tires on this car are in good shape. Unfortunately I tell you how much milage have on them, but I can guess they have at least 25K on them.

Does anyone expert knowledge on whether on 4Matics need to be replaced at a time? Thanks.

Anonymous

The is right that all four need to have the same diameter. If I recall correctly, the tread depth tolerance allows is 2/32″ between the with the greatest depth in the Differences in excess of this place undue stress on the Tires may wear at different overtime, which is why regular is so important for these cars.

There are two ways to achieve One is to replace all four tires. The is to shave the new replacement tire so its tread depth matches the three.

Instead of guessing how mileage is remaining on the three old you should measure the remaining depth. If it is less than they either need to be or the new tire needs to be shaved.

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