64 Safety and SecurityOccupant safetySafety guidelines for the seat belt, 
emergency tensioning device and 
air bagWarning!
G
Damaged seat belts or belts that were 
highly stressed in an accident must be 
replaced and their anchoring points 
must also be checked. Use only belts in-
stalled or supplied by an authorized 
Mercedes-Benz Center.
Air bags and pyrotechnic emergency 
tensioning devices (ETDs) are designed 
to function on a one-time-only basis. An 
air bag or ETD that was activated must 
be replaced. PRE-SAFE
® has electrically 
operated reversible pre-tensioners in 
addition to the pyrotechnic ETDs.
No modifications of any kind may be 
made to any components or wiring of 
the SRS. This includes changing or re-
moving any component or part of the 
SRS, the installation of additional trim 
material, badges, etc. over the steering 
wheel hub, passenger front air bag 
cover, outboard sides of the front seat 
backrests, door trim panels, or door 
frame trims, and installation of addition-
al electrical/electronic equipment on or 
near SRS components and wiring. Keep 
area between air bags and occupants 
free from objects (e.g. packages, purs-
es, umbrellas, etc.).
Do not pass belts over sharp edges. 
They could tear.
Do not make any modification that could 
change the effectiveness of the belts.
Do not bleach or dye seat belts as this 
may severely weaken them. In a crash 
they may not be able to provide ade-
quate protection. 
Do  n o t h a ng i te ms  su ch  as  c o at  ha n ger s 
from the coat hooks or handles over the 
door. These items may turn into projec-
tiles and cause head and other injuries 
when curtain air bag is deployed.
Never place your feet on the instrument 
panel, dashboard, or on the seat. Always 
keep both feet on the floor in front of the 
seat.
Air bag system components will be hot 
after the air bag has inflated. Do not 
touch.
In addition, improper repair work on the 
SRS creates a risk of rendering the SRS 
inoperative or causing unintended 
air bag deployment. Work on the SRS 
must therefore only be performed by 
qualified technicians. Contact an autho-
rized Mercedes-Benz Center.
For your protection and the protection 
of others, when scrapping the air bag 
unit or emergency tensioning device, 
our safety instructions must be fol-
lowed. These instructions are available 
from your authorized Mercedes-Benz 
Center.
Given the considerable deployment 
speed and the textile structure of the 
air bags, there is the possibility of abra-
sions or other injuries resulting from 
air bag deployment. 
280 OperationDriving instructionsRoad salts and chemicals can adversely af-
fect braking efficiency. Increased pedal 
force may become necessary to produce 
the normal braking effect.
Depressing the brake pedal periodically 
when traveling at length on salt-strewn 
roads can bring road-salt impaired braking 
efficiency back to normal. 
If the vehicle is parked after being driven 
on salt-treated roads, the braking efficien-
cy should be tested as soon as possible af-
ter driving is resumed.
For more information on winter driving, see 
“Winter driving” (
page 327).
Standing water
Warning!
G
Make sure not to endanger any other road 
users when carrying out these braking ma-
neuvers.
Warning!
G
If the vehicle becomes stuck in snow, make 
sure that snow is kept clear of the exhaust 
pipe and from around the vehicle with the 
engine running. Otherwise, deadly carbon 
monoxide (CO) gases may enter vehicle in-
terior resulting in unconsciousness and 
death.
To assure sufficient fresh air ventilation, 
open a window slightly on the side of the ve-
hicle not facing the wind.Warning!
G
The outside temperature indicator is not de-
signed to serve as an ice-warning device and 
is therefore unsuitable for that purpose. In-
dicated temperatures just above the freez-
ing point do not guarantee that the road 
surface is free of ice.
!Do not drive through flooded areas or 
water of unknown depth. Before driving 
through water, determine its depth. 
Never accelerate before driving into 
water. The bow wave could force water 
into the engine and auxiliary equip-
ment, thus damaging them.
If you must drive through standing wa-
ter, drive slowly to prevent water from 
entering the passenger compartment 
or the engine compartment. Water in 
these areas could cause damage to 
electrical components or wiring of the 
engine or transmission, or could result 
in water being ingested by the engine 
through the air intake causing severe 
internal engine damage. Any such dam-
age is not covered by the 
Mercedes-Benz Limited Warranty.