Page 296 of 498

295 Operation
Engine compartment
Checking engine oil level with the 
control system
When checking the oil level
the vehicle must be parked on level 
ground
with the engine at operating tempera-
ture, the vehicle must have been 
stationary for at least 5 minutes with 
the engine turned off
with the engine not at operating tem-
perature yet, the vehicle must have 
been stationary for at least 30 minutes 
with the engine turned off
To check the engine oil level via the multi-
function display, do the following:
Switch on the ignition (
page 36).
The standard display (
page 147) should 
appear in the multifunction display.
Press buttonk or j, on the 
multifunction steering wheel until the 
following message is seen in the multi-
function display:One of the following messages will 
subsequently appear in the multifunc-
tion display:
Engine oil level ok
Add 1.0 Qt.to reach max. oil level
(Canada: 
1.0 Liter
)
Add 1.5 Qts.
to reach max. oil level
 to reach 
max. oil level
(Canada: 
1.5 Liters
)
Add 2.0 Qts.
to reach max. oil level
 to reach 
max. oil level
(Canada: 
2.0 Liters
)
If necessary, add engine oil.
For adding engine oil, see (
page 296).
For more information on engine oil, see the 
“Technical data” section (
page 461) and 
(
page 464).
Other display messages
If the SmartKey or KEYLESS-GO start/stop 
button* is not in position2, the following 
message will appear:
Switch on ignition
to check engine oil level
Switch on the ignition (
page 36).
If you see the message:
Observe waiting period
iIf you want to interrupt the checking 
procedure, press thek orj 
button on the multifunction steering 
wheel. 
     
        
        Page 297 of 498

296 OperationEngine compartment
If engine is at operating temperature, 
wait 5 minutes before repeating check 
procedure.
If engine is not at operating tempera-
ture yet, wait 30 minutes before 
repeating check procedure.
If you see the message:
Engine oil level
Not when engine on
Turn off the engine.
If the engine is at normal operating 
temperature, wait 5 minutes before 
checking oil.
If the engine is not yet at normal 
operating temperature, you must wait 
30 minutes before checking oil.If there is excess engine oil with the engine 
at normal operating temperature, the 
following message will appear:
Engine oil level
Reduce oil level
Have excess oil siphoned or drained 
off. Contact an authorized 
Mercedes-Benz Center.
For more information on messages in the 
multifunction display concerning engine 
oil, see the “Practical hints” section 
(
page 382). Adding engine oil!Excess oil must be siphoned or drained 
off. It could cause damage to the 
engine and catalytic converter not 
covered by the Mercedes-Benz Limited 
Warranty.
!Only use approved engine oils and oil 
filters required for vehicles with Main-
tenance System (U.S. vehicles) or 
FSS PLUS (Canada vehicles). For a list-
ing of approved engine oils and oil fil-
ters, refer to the Factory Approved 
Service Products pamphlet in your 
vehicle literature portfolio, or contact 
an authorized Mercedes-Benz Center.
Using engine oils and oil filters of spec-
ification other than those expressly 
required for the Maintenance System 
(U.S. vehicles) or FSS PLUS (Canada 
vehicles), or changing of oil and oil filter 
at change intervals longer than those 
called for by the Maintenance System 
(U.S. vehicles) or FSS PLUS (Canada 
vehicles) will result in engine damage 
not covered by the Mercedes-Benz 
Limited Warranty. 
     
        
        Page 298 of 498
297 Operation
Engine compartment
CLS 500, CLS 55 AMG1Filler cap
Unscrew filler cap1 from filler neck.
Add engine oil as required. Be careful 
not to overfill with oil.
Be careful not to spill any oil when adding. 
Avoid environmental damage caused by oil 
entering the ground or water.
Screw filler cap1 back on filler neck.
For more information on engine oil, see the 
“Technical data” section (
page 461) and 
(
page 464).
Transmission fluid level
The transmission fluid level does not need 
to be checked. If you notice transmission 
fluid loss or gear shifting malfunctions, 
have an authorized Mercedes-Benz Center 
check the transmission.Coolant level
The engine coolant is a mixture of water 
and anticorrosion/antifreeze. To check 
the coolant level, the vehicle must be 
parked on level ground and the engine 
must be cool.
!Excess oil must be siphoned or drained 
off. It could cause damage to the 
engine and catalytic converter not 
covered by the Mercedes-Benz Limited 
Warranty. 
     
        
        Page 485 of 498

484 IndexEmission control 289
Emission control information label 446
Emission control system warranties 10
Emission control vacuum line routing 
diagram label 446
Engine 448
Belt layout 447
Block heater* (Canada only) 337
Break-in recommendations 278
Cleaning 344
Compartment 293
Malfunction indicator lamp 355
Maximum engine speed 448
Number 473
Starting 49
Technical data 448
Turning off with the key 60
Engine compartment
Hood 293Engine oil
Adding 296
Additives 464
Changing 464
Checking level 294
Consumption 294
Filler neck 297
Messages in display 295, 382, 383
Recommended engine oils rand 
oil filters 464
Viscosity 473
Engine oil level 295
ESP
®
86, 473
Synchronizing 368
Warning lamp 353
ETD 73, 473
Safety guidelines 68
Exterior lamp switch 134
Exterior rear view mirrors 44
Parking position 169, 192F
First aid kit 398
Flat tire 419
Collapsible tire 426, 427
Jacking up the vehicle 425
Lowering the vehicle 429
Mounting the spare wheel 423, 426
Preparing the vehicle 419
Spare wheel 423
TIREFIT kit* 419
Flexible Service System 
(Canada vehicles) 339
Flexible Service System (FSS) 474
Floormats 260
Fog lamp, rear 138
Fog lamps
Messages in display 387, 388, 389, 
390
Fog lamps, front
Switching on 137
Front lamps 412
Replacing bulbs 414
Switching on 134