Thank you for this!Somehow it seems to me that folks are convinced that the USA spec 4x4 Sprinters can be spec'ed out to the Iglhaut Allrad fully locked up 4x4 system.
Sorry, but the USA Spec 4x4 Sprinters are only available with the Oberaigner 4ETS (4Matic in passenger cars and SUVs) system.
It's a 65% Rear 35% front system with nothing "locked" that would/could damage the 4x4 system.
The only real difference is that in Sprinters, the entire 4ETS/4Matic "system" is selectable in that it can be turned off, giving you only rear 2 wheel
You can add the optional Hi/Lo transfer case, but that just provides a gear reduction to the overall system.
In low range with the 4ETS engaged you have 5 speeds, but an overall gear reduction that provides lots of power to the wheels, but they are still
35% front/65% rear.
So, there is really nothing wrong with running the 4ETS system on hard roads......there are an untold number of MB sedans/SUVS that are running the 4ETS/
4Matic system all the time with no way to disengage it.
Makes sense, on a dry road in warm temperatures to disengage it and run in 2 wheel drive for better fuel economy, but when it's cold and there's a possibility
of ice or snow, keep it engaged.
Hope this helps,