289 Controls in detail
Useful features
Roadside Assistance button•
Located below the center armrest cover is 
the Roadside Assistance button•.
Press and hold the button (for longer 
than 2 seconds).
A call to a Mercedes-Benz Roadside As-
sistance dispatcher will be initiated. 
The button will flash while the call is in 
progress. The message 
Connecting 
call
 will appear in the multifunction 
display and the audio system is muted.
When the connection is established, the 
message Call connected
 appears in the 
multifunction display. The Tele Aid system 
will transmit data generating the vehicle 
identification number, model, color and lo-
cation (subject to availability of cellular 
and GPS signals).
A voice connection between the Roadside 
Assistance dispatcher and the occupants 
of the vehicle will be established.
Describe the nature of the need for as-
sistance.The Mercedes-Benz Roadside Assistance 
dispatcher will either dispatch a qualified 
Mercedes-Benz technician or arrange to 
tow your vehicle to the nearest authorized 
Mercedes-Benz Center. For services such 
as labor and/or towing, charges may ap-
ply. Refer to the Roadside Assistance man-
ual for more information.
The following is only available in the USA:
Sign and Drive services: Services such 
as a jump start, a few gallons of fuel or 
the replacement of a flat tire with the 
vehicle spare tire are obtainable.
Warning!
G
If you feel at any way in jeopardy when in the 
vehicle (e.g. smoke or fire in the vehicle, ve-
hicle in a dangerous road location), please 
do not wait for voice contact after you have 
pressed the emergency button. Carefully 
leave the vehicle and move to a safe loca-
tion. The Response Center will automatically 
contact local emergency officials with the 
vehicle’s approximate location if they re-
ceive an automatic SOS signal and cannot 
make voice contact with the vehicle occu-
pants. 
359 Operation
Winter driving
Block heater* (Canada only)
The engine is equipped with a block heat-
er.
The electrical cable may be installed at an 
authorized Mercedes-Benz Center.Snow chains
Snow chains should only be driven on 
snow-covered roads at speeds not to ex-
ceed 30 mph (50 km/h). Remove chains 
as soon as possible when driving on roads 
without snow.Please observe the following guidelines 
when using snow chains:
Use of snow chains is not permissible 
with all wheel/tire combinations.
Snow chains should only be used on 
the rear wheels. Follow the manufac-
turer’s mounting instructions.
Only use snow chains that are ap-
proved by Mercedes-Benz. Your autho-
rized Mercedes-Benz Center will be 
glad to advise you on this subject.
Use of snow chains may be prohibited 
depending on location. Always check 
local and state laws before installing 
snow chains.
Have the spare tire replaced with a winter 
tire at the nearest authorized 
Mercedes-Benz Center.!When driving with snow chains, always 
select the raised level of the level con-
trol system Airmatic* (
page 260). 
Other settings may result in damage to 
your vehicle.
iWhen driving with snow chains, you 
may wish to deactivate the ESP
® 
(
page 96) before setting the vehicle 
in motion. This will improve the vehi-
cle’s traction.
!Even on vehicles with all-wheel-drive, 
use snow chains on rear tires only.
Some tire sizes do not leave adequate 
clearance for snow chains. To help 
avoid serious damage to your vehicle or 
tires, use of snow chains is not permis-
sible with the following tire sizes:
265/35 ZR18 XL (Extra Load)
T 155/70 R17 110 M
T 175/55-18 95 P