Page 64 of 376

64 Safety and SecurityOccupant safety
Emergency tensioning device (ETD), 
seat belt force limiter
The seat belts for the front and rear outer 
seats are equipped with emergency ten-
sioning devices and belt force limiters.
The ETD is designed to activate in the fol-
lowing cases when the seat belts are fas-
tened:
in frontal or rear-end impacts 
exceeding a preset severity level
if the restraint systems are operational 
and functioning correctly. 
See
1
indicator lamp (
page 56).
In an impact, emergency tensioning devic-
es remove slack from the belts in such a 
way that the seat belts fit more snugly 
against the body. Belt force limiters reduce 
the force exerted by the seat belts on oc-
cupants during a crash.
width of the belt to manage impact 
forces. The twisted belt against your 
body could cause injuries.
Pregnant women should also use a 
lap-shoulder belt. The lap belt portion 
should be positioned as low as possible 
on the hips to avoid any possible pres-
sure on the abdomen.
Never place your feet on the instrument 
panel or on the seat. Always keep both 
feet on the floor in front of the seat.
Warning!
G
An emergency tensioning device (ETD) that 
was activated must be replaced.
When scrapping the emergency tensioning 
device, our safety instructions must be fol-
lowed. These are available at your autho-
rized Mercedes-Benz Center.!Do not place objects heavier than 
20 lbs (9 kg) on the front passenger 
seat. This could cause the front or side 
impact airbag on the front passenger 
side to deploy in a crash which exceeds 
the system's deployment threshold. 
     
        
        Page 251 of 376

251 Operation
Vehicle care
Vehicle washing
Do not use hot water or wash your vehicle 
in direct sunlight. Use only a mild car wash 
detergent, such as Mercedes-Benz 
approved Car Shampoo.
Thoroughly spray the vehicle with a dif-
fused jet of water. Direct only a very weak 
spray towards the ventilation intake. Use 
plenty of water and rinse the sponge and 
chamois frequently. 
Rinse with clear water and thoroughly dry 
with a chamois. Do not allow cleaning 
agents to dry on the finish.
Due to the width of the vehicle, fold in out-
side mirrors prior to running the vehicle 
through an automatic car wash to prevent 
damage to the mirrors.
In the winter, thoroughly remove all traces 
of road salt as soon as possible.
When washing the underbody, do not for-
get to clean the inner sides of the wheels.Ornamental moldings
For regular cleaning and care of very dirty 
chrome-plated parts, use a chrome 
cleaner.
Headlamps, tail lamps, turn signal 
lenses
Use a mild car wash detergent, such as 
Mercedes-Benz approved Car Shampoo, 
with plenty of water.
To prevent scratches, never apply strong 
force and use only a soft, non-scratchy 
cloth when cleaning the lenses. Do not at-
tempt to wipe dirty lenses with a dry cloth 
or sponge.
Wiper blades
Clean the wiper blade inserts with a clean 
cloth and detergent solution.Window cleaning
Use a window cleaning solution on all glass 
surfaces. An automotive glass cleaner is 
recommended.
iFor safety reasons, switch off wipers 
and remove key from starter switch be-
fore cleaning the wiper blades, other-
wise the wiper motor can suddenly turn 
on and cause injury.!Fold the windshield wiper arms back 
onto the windshield before turning the 
key in the starter switch.iFor safety reasons, switch off wipers 
and remove key from starter switch be-
fore cleaning the windshield, otherwise 
the wiper motor can suddenly turn on 
and cause injury. 
     
        
        Page 327 of 376
327 Technical data
Main dimensions
Main dimensions
C230KompressorSport
C240
C320
C320Sport
C2404MATIC
C3204MATIC
C3204MATICSport
C32AMG
Overall vehicle length
178.2 in (4 526 mm)
178.2 in (4 526 mm)
178.2 in (4 526 mm)
178.2 in (4 526 mm)
Overall vehicle width
68.0 in (1 728 mm)
68.0 in (1 728 mm)
68.0 in (1 728 mm)
68.0 in (1 728 mm)
Overall vehicle height
56.4 in (1 433 mm)
56.3 in (1 429 mm)
56.0 in (1 422 mm)
56.1 in (1 426 mm)
Wheelbase
106.9 in (2 715 mm)
106.9 in (2 715 mm)
106.9 in (2 715 mm)
106.9 in (2 715 mm)
Track, front
58.8 in (1 493 mm)
58.8 in (1 493 mm)
58.8 in (1 493 mm)
58.8 in (1 493 mm)
Track, rear
57.6 in (1 464 mm)
57.6 in (1 464 mm)
57.6 in (1 464 mm)
58.0 in (1 474 mm) 
     
        
        Page 339 of 376

339 Technical data
Consumer information
Consumer information
The following text is published as required 
of all manufacturers of passenger cars un-
der Title 49, Code of U.S. Federal Regula-
tions, Part 575 pursuant to the “National 
Traffic and Motor Vehicle Safety Act of 
1966”.Uniform tire quality grading
Quality grades can be found, where appli-
cable, on the tire sidewall between tread 
shoulder and maximum section width. For 
example:
All passenger car tires must conform to 
federal safety requirements in addition to 
these grades.Tread Wear
The tread wear grade is a comparative rat-
ing based on the wear rate of the tire when 
tested under controlled conditions on a 
specified government test course. For ex-
ample, a tire graded 150 would wear one 
and one-half (
1/2) times as well on the 
government course as a tire graded 100. 
The relative performance of tires depends 
upon the actual conditions of their use, 
however, and may depart significantly 
from the norm due to variations in driving 
habits, service practices and differences in 
road characteristics and climate.Traction
The traction grades, from highest to lowest 
are AA, A, B, and C. Those grades repre-
sent the tire’s ability to stop on wet pave-
ment as measured under controlled 
conditions on specified government test 
surfaces of asphalt and concrete. A tire 
marked C may have poor traction perfor-
mance.
Tread wear
Traction
Temperature
200
AA
A
Warning!
G
The traction grade assigned to this tire is 
based on straight ahead braking traction 
tests, and does not include acceleration, 
cornering, hydroplaning, or peak traction 
characteristics.