Page 154 of 498

153 Controls in detail
Control system
Standard display menu
Press buttonk orj repeatedly 
to select the functions in the standard 
display menu.
The following functions are available:
Display digital speedometer
Press buttonk orj repeatedly 
until the digital speedometer appears 
in the multifunction display.
AUDIO menu
The functions in the 
Audio
 menu operate 
the audio equipment which you currently 
have turned on.
If no audio equipment is currently turned 
on, the message 
AUDIO off 
is shown in the 
multifunction display.
The following functions are available:Select radio station
Turn on COMAND and select radio. 
Refer to separate COMAND operating 
instructions.
Press buttonè orÿ repeatedly 
until you see the currently tuned sta-
tion in the multifunction display.
1Waveband setting
2Station frequency
Press buttonk orj repeatedly 
until the desired station is found.
Function
Page
Call up digital speedometer
153
Call up maintenance display
339
Checking tire inflation pressure
313
Check engine oil level
295
Function
Page
Select radio station
153
Select satellite radio station*
154
Operate CD player
154 
     
        
        Page 293 of 498
292 OperationAt the gas station
Engine oil level
For more information on engine oil level, 
see “Engine oil” (
page 294).
Vehicle lighting
Check function and cleanliness. For more 
information on replacing light bulbs, see 
the “Practical hints” section (
page 411).
For more information, see “Exterior lamp 
switch” (
page 134).Tire inflation pressure
For more information, see “Checking tire 
inflation pressure” (
page 313).
!If you find that the brake fluid in the 
brake fluid reservoir has fallen to the 
minimum mark or below, have the 
brake system checked for brake pad 
thickness and leaks immediately. 
Notify an authorized Mercedes-Benz 
Center immediately. Do not add brake 
fluid as this will not solve the problem. 
For more information, see “Practical 
hints” (
page 354). 
     
        
        Page 467 of 498

466 Technical dataFuels, coolants, lubricants etc.In areas where carbon deposits may be 
encountered due to lack of availability of 
gasolines which contain these additives, 
Mercedes-Benz recommends the use of 
additives approved by us for use on 
Mercedes-Benz vehicles. Refer to Factory 
Approved Service Products Pamphlet for a 
listing of approved product(s). Follow di-
rections on product label.
Do not blend other fuel additives with fuel. 
This only results in unnecessary costs and 
may be harmful to the engine operation.
Damage or malfunction resulting from 
poor fuel quality or from blending addition-
al fuel additives other than those tested 
and approved by us for use on 
Mercedes-Benz vehicles listed in the Fac-
tory Approved Service Products pamphlet 
are not covered by the Mercedes-Benz 
Limited Warranty.
Fuel requirements
Only use premium unleaded gasoline 
meeting ASTM standard D 439.
The octane number (posted at the pump) 
m u s t  b e  9 1  m i n .  I t  i s  a n  a v e r a g e  o f  b o t h  t h e  
Research (R) Octane Number and the Mo-
tor (M) Octane Number: (R+M)/2). This is 
also known as the ANTI-KNOCK INDEX.
Unleaded gasoline containing oxygenates 
such as ethanol, IPA, IBA and TBA can be 
used provided the ratio of any one of these 
oxygenates to gasoline does not exceed 
10%; MTBE must not exceed 15%.
The ratio of methanol to gasoline must not 
exceed 3% plus additional cosolvents.
Using mixtures of ethanol and methanol is 
not allowed. Gasohol, which contains 10% 
ethanol and 90% unleaded gasoline, can be 
used.
These blends must also meet all other fuel 
requirements, such as resistance to spark 
knock, boiling range, vapor pressure, etc.
Coolants
The engine coolant is a mixture of water 
and anticorrosion/antifreeze, which pro-
vides:
Corrosion protection
Freeze protection
Boiling protection (by increasing the 
boiling point)
The cooling system was filled at the factory 
with a coolant providing freeze protection 
to approximately -22°F (-30°C) and corro-
sion protection.