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Information on tractor/trailer syn-
chronisation ................................... 321
Swivel angle ................................... 321
Trailer tow hitch
see Separate operating instructions
Trailer/semitrailer
Notes about trailer/semitrailer
coupling ......................................... 319
Trailers/semi-trailers
Semi-trailer hydraulic system ........ 326
Trailing axle ....................................... 300
Transfer case ..................................... 270
Transmission
Setting the oil grade (on-board
computer) ...................................... 151
Transmission faulty
Red display message ..................... 179
Yellow display message ................. 164
Transmission mode selection
Mercedes PowerShift ..................... 256
Transmission oil
Checking oil level (automatic
transmission) ................................. 360
General notes ................................ 420
Quality ........................................... 420
Transmission shift system
Activating backup drive mode (on-
board computer) ............................ 140
Activating/deactivating crawler
mode (button) ................................ 257
Activating/deactivating crawler
mode (on-board computer) ............ 151
Activating/deactivating EcoRoll
mode (on-board computer) ............ 151
Activating/deactivating Hydro-
move .............................................. 151
Activating/deactivating PPC (on-
board computer) ............................ 151
Automatic transmission ................. 262
Manual transmission ...................... 251
Mercedes PowerShift ..................... 253
Transmission: oil temperature too
high
Yellow display message ................. 164
Transmission/clutch circuit
Checking the supply pressure ........ 241
Transmission/clutch reserve pres-
sure too low
Yellow display message ................. 162
Trip computer
Calling up/resetting (on-board
computer) ...................................... 137
Trip data (on-board computer) ......... 137
Trip meter .......................................... 130
Truck-App
Connecting/disconnecting
mobile devices (on-board com-
puter) ............................................. 142
General notes ................................ 112
Turbo retarder clutch
see Hydrodynamic clutch
Turn signal
Replacing bulbs (side turn signal
lamp) ............................................... 96
Turn signal faulty
Yellow display message ................. 166
Turn signal lamp
Replacing bulbs (headlamp) ............. 96
Turn signals
Changing a bulb (rear lamp clus-
ter) ................................................... 97
Replacing bulbs ............................... 96
Switching on/off .............................. 88
Twin tyres (tyre pressure) ................ 411
Type identification plate
see Vehicle identification plate
Tyre inflator hose .............................. 370
Tyre pressure
Determining ................................... 405
Displaying ...................................... 145
Important safety notes .................. 404
Maximum permissible air pres-
sure ............................................... 427
Monitoring (on-board computer) .... 144
Permissible difference in pres-
sure ............................................... 427
Pressure loss warning .................... 145
Table (single tyres) ......................... 406
Table (twin tyres) ........................... 411
Tyre pressure checker ...................... 370
Tyre pressure in spare wheel too
low
Grey display message .................... 156
Index
25
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