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Thread: Mercedes gearbox settings

  1. #31
    Join Date
    Mar 2008
    Posts
    97

    Default VIN number

    Hi,

    Apologies for the delay, have been juggling work. Have sent PM with VIN number. If you can pull up the details that would be great.

    Thanks
    Cheers Tobias

  2. #32
    Join Date
    Feb 2010
    Location
    Essex UK
    Posts
    87
    Joe

    When I select the wavy line it selects 4 WD and lights up the centre diff ( transfer box ) symbol on the dash.

    Neil

  3. #33
    Join Date
    Nov 2012
    Location
    Ontario Canada
    Posts
    704
    Neil
    Is there a 4wd light and a center diff light or just a center diff light?
    Is there not an independent diff lock switch to the high/low switch(wavy/straight)?
    How do you know it selects 4wd? The center diff light does not indicate 2wd/4wd, it only indicates the center diff is locked. With the center diff unlocked the truck is still in 4wd but the power can be distributed freely between front and rear.
    Joe.
    1993 Mercedes-Benz 917 AF

  4. #34
    Join Date
    Feb 2010
    Location
    Essex UK
    Posts
    87
    Joe

    Centre diff/ transfer box light only. As said before when the wavy line is selected on the pneumatic switch, this engages 4wd, lowers the ratio and lights the light.

    I know it does this because I have turned the switch and it happened.

    The handbook also tells me it will happen if I turn the switch.

    Neil

  5. #35
    Join Date
    Nov 2012
    Location
    Ontario Canada
    Posts
    704
    Interesting. From the Mercedes manual:

    3.4.2.3 Transfer case

    The transfer case should only be engaged when the vehicle is at a standstill.

    Shifting positions:
    -Road position
    -Neutral position
    No power is transmitted from the transfer case to the live axles.
    -Cross-country operation position
    The cross-country gear of the transfer case is intended mainly for cross-country
    operation and climbing of steep gradients When the lever is moved to the
    cross-country gear a lower speed ratio is engaged.


    That is all it does on my truck, engage high/neutral/low. There is no light associated with the switch. No 2wd/4wd.
    The manual also refers to these trucks as all wheel drive vehicles.
    1993 Mercedes-Benz 917 AF

  6. #36
    Join Date
    Mar 2014
    Location
    Bedfordshire, England
    Posts
    188
    Lots of folk don't understand 4x4 they think all 4 wheels drive at the same time! they do but not positively!
    Easy way to test it is, jack up any 1 wheel, with no switches pressed try to drive away, if it is working correctly the wheel will spin and you don't move (open centre diff) next jack up 1 wheel on each axle and engage centre diff, now 2 wheels, 1 on each axle will spin, you still don't move. engage either axle diff lock and it will pull you off the jack.

    Using this method you test the operation of the diffs and lockers.
    Life is just a journey, but sometimes you take a wrong turn!

  7. #37
    Join Date
    Sep 2017
    Location
    UK
    Posts
    8
    Hi,

    Just closing the loop on this one, finally got it fixed, was an air problem although struggled with 4 different garages understanding 4x4 before got it sorted. Truck is permanent 4x4. Selector was High, Neutral, Low. Have separate switches for centre and rear diff locks and PTO is off a switch on the dash. In low truck goes up to about 40 mph, in high, about 60mph. Thanks for all the help

    Cheers Toby

  8. #38
    Join Date
    Apr 2007
    Location
    Baja Oregon
    Posts
    1,071
    I'm glad you have it working now.
    According to the 'Operating Instructions' for the 1017,1217,1417,1617 (PN#380 584 01 96) that selector is for the VG500-3W transfer case.
    If the truck is NOT equipped with differential lock(s) then in position 1, it is 2x4. When position 3 is selected you get 4x4 and low range
    If the truck is equipped with differential lock(s) then in position 1, it is 4x4. When position 3 is selected you get low range.
    Click to enlarge
    VG500-3W-manual.jpg

  9. #39
    Join Date
    Nov 2012
    Location
    Ontario Canada
    Posts
    704
    Quote Originally Posted by mog View Post
    I'm glad you have it working now.
    According to the 'Operating Instructions' for the 1017,1217,1417,1617 (PN#380 584 01 96) that selector is for the VG500-3W transfer case.
    If the truck is NOT equipped with differential lock(s) then in position 1, it is 2x4. When position 3 is selected you get 4x4 and low range
    If the truck is equipped with differential lock(s) then in position 1, it is 4x4. When position 3 is selected you get low range.
    Click to enlarge
    VG500-3W-manual.jpg
    Good info. Confirmation there are full time 4x4 and part time 4x4 variants.
    1993 Mercedes-Benz 917 AF

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