M-Class (W166) Produced 2012-2015

Center Differential, Rear Diff, Front diff, Transmission, Engine

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Old Mar 19, 2012 | 04:44 PM
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300D Turbo 1984
Center Differential, Rear Diff, Front diff, Transmission, Engine

Anyone have detailed specs on the drivetrain? I wanted to know if we had the torsen in the center? and LSD in the front and rear? Not that I'll be offroading, but just curious.
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Old Mar 19, 2012 | 10:11 PM
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300D Turbo 1984
... BUELLER... BUELLER... BUELLER... BUELLER... BUELLER...
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Old Mar 19, 2012 | 10:23 PM
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2020 GLE 450; 2023 BMW M2 Coupe
ON&OFF Road Package

You need this (available 2013), a post you've seen before:

https://mbworld.org/forums/new-m-cla...iled-info.html

https://mbworld.org/forums/new-m-cla...romo-pics.html

Basic system is described thusly:

"For those who want to venture off surfaced roads, the ML 350 BlueTEC 4MATIC and ML 350 BlueEFFICIENCY 4MATIC models feature an extensive off-road specification as standard, which considerably enhances their capabilities when the going gets tough. Apart from 4MATIC permanent all-wheel drive and the electronic traction control system 4ETS, this also includes an off-road button that activates a special off-road driving mode:

■To improve traction, the wheel slip thresholds and the shift points
of the 7G-TRONIC PLUS transmission are raised
■A flatter accelerator response curve enables more sensitive throttle control
■Off-road ABS ensures optimum braking characteristics, especially on loose surfaces

Start-off Assist and the HOLD function furthermore come to the driver's assistance when performing a hill start, while Downhill Speed Regulation, or DSR, enables the M-Class to automatically maintain the speed set with the cruise control lever on descents."

Last edited by GregW / Oregon; Mar 19, 2012 at 10:29 PM.
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Old Mar 19, 2012 | 11:18 PM
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300D Turbo 1984
thanks greg, i wanted to know specifically the technology in my rig. just to "know" i find the torsens are silky smooth when in neutral and turning while rolling <5 mph. the benz is a little sticky. i wanted to know what diff (center) we have.
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Old Mar 19, 2012 | 11:28 PM
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Originally Posted by GregW / Oregon
You need this (available 2013), a post you've seen before:

https://mbworld.org/forums/new-m-cla...iled-info.html

https://mbworld.org/forums/new-m-cla...romo-pics.html

Basic system is described thusly:

"For those who want to venture off surfaced roads, the ML 350 BlueTEC 4MATIC and ML 350 BlueEFFICIENCY 4MATIC models feature an extensive off-road specification as standard, which considerably enhances their capabilities when the going gets tough. Apart from 4MATIC permanent all-wheel drive and the electronic traction control system 4ETS, this also includes an off-road button that activates a special off-road driving mode:

■To improve traction, the wheel slip thresholds and the shift points
of the 7G-TRONIC PLUS transmission are raised
■A flatter accelerator response curve enables more sensitive throttle control
■Off-road ABS ensures optimum braking characteristics, especially on loose surfaces

Start-off Assist and the HOLD function furthermore come to the driver's assistance when performing a hill start, while Downhill Speed Regulation, or DSR, enables the M-Class to automatically maintain the speed set with the cruise control lever on descents."
All diffs are open type; wheel braking is used for traction control.
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Old Mar 20, 2012 | 01:03 PM
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Front, middle, and rear differentials are open. No fancy stuff. Torque split front to rear is 50/50. Mercedes relies on the traction control using the brakes to transfer torque.

It works OK, but anyone that has had these off-road will tell you that truck with a locking rear and locked center, as most full-size pickups and truck based SUV have, are much better off-road.

The off-road package that we will get changes the traction control slip and engagement points. Seems weak for an off-road package.

It would be nice to be able to get a low range transfer case and be able to lock the center and rear diffs.

Last edited by longisland516; Mar 20, 2012 at 01:03 PM. Reason: spelling
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Old Mar 20, 2012 | 01:32 PM
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04 sl 500, 07 ml 320 cdi
with off road package it has also low range , ratio 2,93:1 as the old, with center diff lock...and 3 level airmatic height
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Old Mar 20, 2012 | 02:03 PM
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Originally Posted by longisland516
Front, middle, and rear differentials are open. No fancy stuff. Torque split front to rear is 50/50. Mercedes relies on the traction control using the brakes to transfer torque.

It works OK, but anyone that has had these off-road will tell you that truck with a locking rear and locked center, as most full-size pickups and truck based SUV have, are much better off-road.

The off-road package that we will get changes the traction control slip and engagement points. Seems weak for an off-road package.

It would be nice to be able to get a low range transfer case and be able to lock the center and rear diffs.
"In terms of "hardware", the ON&OFFROAD package comprises an underguard, a two-stage transfer case with reduction gear, an inter-axle differential lock and enhanced AIRMATIC functionality that allows a maximum ground clearance of 285 millimetres and a fording depth of 600 millimetres."
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Old Mar 20, 2012 | 08:07 PM
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1991 300CE, 2013 ML350 Bluetec, 2014 ML350 Bluetec, 2012 Ram 1500
I read that the USA would not get low range or locking diffs for the off-road package, just like we didn't get it on the last ML/GL. It would be great if I am wrong, but history shows we don't get the good stuff.
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Old Mar 20, 2012 | 10:35 PM
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GregW / Oregon's Avatar
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From: Lake Oswego, OR
2020 GLE 450; 2023 BMW M2 Coupe
US ON&OFF Road Package

Originally Posted by longisland516
I read that the USA would not get low range or locking diffs for the off-road package, just like we didn't get it on the last ML/GL. It would be great if I am wrong, but history shows we don't get the good stuff.
Where did you read that? I can't believe they would make a watered-down version for the US. YYZ?
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Old Mar 20, 2012 | 11:54 PM
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300D Turbo 1984
Originally Posted by 300DTurbo
Anyone have detailed specs on the drivetrain?
So Google has let me down and this forum doesn't seem to have anything to add... i guess time to call benz...
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Old Mar 21, 2012 | 11:16 AM
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GregW / Oregon's Avatar
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Drivetrain for off road

Originally Posted by 300DTurbo
So Google has let me down and this forum doesn't seem to have anything to add... i guess time to call benz...
Not sure what detail you're looking for beyond what I posted above? No Torsen or other limited slips in the standard drivetrain.

Front suspension & diff:



Rear suspension & diff:



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