A-Class (W176) [Official] Mercedes-Benz A45 AMG

[Deckhook]

Aren't some X-drives 30:70 ?

Funny you should mention that because we did have a debate on the subject awhile ago and I plus many others said no it's always been 40:60 but I happened to read a piece on the old X3 that did state it was 30:70 so now I'm not so sure we were right to dismiss the 30:70 belief.

Hopefully someone like Scott could confirm which is right.

 

[mini_cooper4]

Funny you should mention that because we did have a debate on the subject awhile ago and I plus many others said no it's always been 40:60 but I happened to read a piece on the old X3 that did state it was 30:70 so now I'm not so sure we were right to dismiss the 30:70 belief.

Hopefully someone like Scott could confirm which is right.

I always knew it is 30:70 but if someone proves me wrong with facts then I'll be more than happy to learn something new
I think I've heard BMW and their guys stating so and I chose to believe. Let's see what we have about this

 

[Giannis]

the frictional co-efficient is increased because of the higher load on the front wheels.

A small correction if I may: The frictional coefficiecient won't changed based on the load. It only depends on the surfaces. The friction force is what changes, as it's calculated as (friction coefficient)*(vertical reaction = load on front wheels)

• Exceeding the µ-jump limit → 10:90

What's the μ-jump limit?

 

[Wolfgang]

What's the μ-jump limit?

Used during ABS testing where left and right tires experience different traction coefficients.

Actros in the mμ-split ABS test

163 on the "checkerboard"

163 on the mμ-split 20% slope

 

[Sunny]

• Heavy braking with ABS intervention → 100:00

Shouldn't that read 00:00?

 

[Giannis]

Shouldn't that read 00:00?

Nope. When you are braking and at the same time downshifting, using the engine braking to your advantage, you want the front wheels to be connected to the engine, as they have a higher load, due to the CoG shift towards the front.

 

[Deckhook]

I always knew it is 30:70 but if someone proves me wrong with facts then I'll be more than happy to learn something new
I think I've heard BMW and their guys stating so and I chose to believe. Let's see what we have about this

It was an article on the X1 not the X3 but here it is.

http://www.carmagazine.co.uk/News/S...Pictures/BMW-X1-2009-first-official-pictures/

 

[Wolfgang]

DriveLineNEWS.com put up a large picture of the rear axle center piece for us.


View attachment f6b4441548274226b918f3ed87366e17.jpg

COMPACT MERCEDES GOES AWD WITH INNOVATIVE SYSTEM
http://drivelinenews.com/news/compact-mercedes-goes-awd-with-innovative-system/

 

[martinbo]

Regarding the somewhat off-topic discussion on xDrive nominal torque split... According to BMW it's 40:60 front to rear.

http://www.bmw-xdrive-guide.com/xd_en/bmw_xdrive/bmw_xdrive_technology

 

[DjordjeC63]

Actros in the mμ-split ABS test

That's not Actros, that's Mercedes SK

http://en.wikipedia.org/wiki/Mercedes-Benz_SK

 

[Cashmere]

Wolfgang, you beauty!

 

[Human]

Regarding the somewhat off-topic discussion on xDrive nominal torque split... According to BMW it's 40:60 front to rear.
http://www.bmw-xdrive-guide.com/xd_en/bmw_xdrive/bmw_xdrive_technology

Was there any doubt?

(Btw, nice find Wolfgang. If there's a cutaway to be found of any interest and whoever reads this: POST IT! Please do, I am a cutaway fanatic.)

 

[martinbo]

Was there any doubt?

Yes, a couple of posts - see a few posts up in this thread.

 

[Deckhook]

If there's a cutaway to be found of any interest and whoever reads this: POST IT! Please do, I am a cutaway fanatic.)

Just for you mate, fill you boots.

And I've a lot more where that came from if you like.

 

[Wolfgang]

The Daimler Blog published an article about the AMG Driving Academy in Arjeplog.

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http://blog.daimler.de/2013/02/20/amg-winter-sporting-in-arjeplog/

 

[Wolfgang]

More A45 AMG 4MATIC detail pics/cutaways.

Source: MB Passion -- http:///

 

[Sunny]

Sorry if I missed it, but any note on how much the A45 weighs and the weight distribution?

 

[Wolfgang]

Haven't seen a published weight yet. The A250 SPORT weighs 1465 kg in Germany, which is 3230 lbs. Then add the new light weight 4Matic, additional cooling shown above, powertrain reinforcements/brakes etc. Folks on MB Passion are currently estimating 1550 kg (3418 lbs).

 

[donkeykong]

 

[Human]

More A45 AMG 4MATIC detail pics/cutaways.

Source: MB Passion -- http:///

i am a cutaway FANATIC. And kudos to Daimler, they do cutaway best followed by VAG. Unfortunately apart from engine cutaways BMW gives a s..t about cutaways.

Thanks Wolfgang