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w204 C-class
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Do you think this information about Mercedes W204 C-Class is incomplete? Please send us what you know to 
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Can someone please add the Viano/Vito’s AWD system?
Afaik it’s permanent & 35/65 F/R, with open diffs & just electronically braking the spinning wheels.
Was there a version with rear LSD too?
Hi I need the diff lock for M.Benz 519 2019(new body) Can you help me?
the GL X164 and the ML W164 w/offroad package have all wheel drive with 4ETS plus Center and Rear Diff Lock plus 2 speed transfer case
Is there any reason why there's no 4Matic option for V12 motors in Mercedes-Benz S-Class?
The Engine is so large, that they can't fit the front diff below it. Plus (and this part i'm guessing) all that power they probably haven't done a diff that can handle it in a small casing
The C-Class W204 has the same system as the ML shown above, but without the 2-speed transfer case. Instead it employs a multi-disc limited slip diff integrated into the 7G-Tronic that is set bias 45:55. Bias could be varied 70:30 to 30:70. Other than that, the system is nearly identical: Front and Rear open diffs with 4ETS.
This system is also employed on the GLK (non-off-road variant) and W212 E-Class. I believe the W218 CLS also shares the same underpinnings.
Mercedes 4Matic has at least center multi-disc clutch LSD, which is not described here. It doesn't only rely on 4ETS to control slipery. This is very useful in low speed off-road condition.
The newest design 4matic has changed the center differential to a 45/55 split, and has an initial pre-load clutch.
There isn't any variable clamp load to regulate the differential.
Mercedes probably could have achieved equivalent traction with the old transfer box by installing a torsen differential in the rear axle.
That W124 transfer case is one of the most sophisticated, probably ever.
You can have rear wheel drive [0/100, via a locked up center differential and open transfer clutch]
Four wheel drive [35/65, via an open center differential lockup clutch, and closed transfer clutch]
Rigid/fixed four wheel drive [both clutches closed, for getting yourself 'unstuck']
(if the electronics and rear transfer clutch were modernized, you could also have a variable distribution to the front)
If possible, please show some detail about the AWD system of S-E-C class that base on front wheel drive.
Thanks
Never heard of a four wheel drive SEC-class.
