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80 Flexible service system
Te ch n ica l
data Instruments 
and controlsOperationDrivingInstrument 
cluster displayPractical hints Car care Index
Flexible service system (FSS) 
(service indicator)
The FSS permits a flexible service schedule that is 
directly related to the operating conditions of the 
vehicle.
The symbol 9 or š appears in the main odometer 
display field prior to the next suggested service.
Depending on operating conditions throughout the year, 
the next service is calculated and displayed in days 
š or distance 9 remaining.The symbols 9 or ´ indicate the type of service 
to be performed:
9Service A
´Service B
The message is displayed for approximately 10 seconds 
when turning the key in steering lock to position 2, or 
while driving when reaching the service warning 
threshold. It can be canceled manually by pressing 
button (1).
Once the suggested term has passed, the message plus 
symbol 9 or š, preceded by a – (minus symbol) 
blinks for approx. 30 seconds and a signal sounds every 
time when turning the key in steering lock to position 2.
The FSS display can also be called up for approx. 
10 seconds with display illuminated by pressing 
button (1) twice within 1 second.
Following a completed A or B service the Mercedes-Benz 
Center sets the counter to 10 000 miles (Canada: 15 000 
km) and 365 days. 
     
        
        Page 85 of 302

81 Flexible service system
Te ch n ica l
data Instruments 
and controlsOperationDrivingInstrument 
cluster displayPractical hints Car care Index The counter can also be set by any individual. To do so:
1. Turn key in steering lock to position 2.
2. Within 4 seconds press button (1) twice.
3. The present status for days or distance is displayed. 
Within 10 seconds turn key in steering lock to 
position 0.
4. Press and hold button (1), while turning key in 
steering lock to position 2 again. The present status 
for days or distance is displayed once more. 
Continue to hold button (1).
After approx. 10 seconds a signal sounds, and the 
display shows 10 000 miles (Canada: 15 000 km) for 
approx. 10 seconds.
5. Release button (1).
If the FSS counter was inadvertently reset, have a 
Mercedes-Benz Center correct it.Note:
When disconnecting vehicle battery for one or more 
days at a time, such days will not be counted. Any such 
days not counted by FSS can be added by your 
Mercedes-Benz Center.
The interval between services is determined by the kind 
of vehicle operation. For example driving at extreme 
speeds, and cold starts combined with short distance 
driving in which the engine does not reach normal 
operating temperature, reduce the interval between 
services.
Model SL 500
The FSS allows for distances between 10 000 miles 
(Canada: 15 000 km) and 20 000 miles (Canada: 
30 000 km), or from 365 to 730 days between services.
Model SL 600
The FSS allows for distances between 10 000 miles 
(Canada: 15 000 km) and 16 000 miles (Canada: 
25 000 km), or from 365 to 730 days between services.
However you choose to set your reference numbers, the 
scheduled services as posted in the Service Booklet 
must be followed to properly care for your vehicle. 
     
        
        Page 283 of 302

279 Fuels, coolants, lubricants etc. - capacities
Te ch n ica l
data Instruments 
and controlsOperation DrivingInstrument 
cluster displayPractical hints Car care Index Engine oils
Engine oils are specifically tested for their suitability in 
our engines. Therefore, use only engine oils 
recommended by Mercedes-Benz. Information on 
recommended brands is available at your authorized 
Mercedes-Benz Center.
Please follow Service Booklet recommendations for 
scheduled oil changes. Failure to do so could result in 
engine damage not covered by the Mercedes-Benz 
Limited Warranty.
Engine oil additives
Do not blend oil additives with engine oil. They may be 
harmful to the engine operation.
Damage or malfunctions resulting from blending oil 
additives are not covered by the Mercedes-Benz Limited 
War ra nt y.Air conditioner refrigerant
R-134a (HFC) refrigerant and special PAG lubricating oil 
is used in the air conditioner system.
Never use R-12 (CFC) or mineral-based lubricating oil, 
otherwise damage to the system will occur.
Brake fluid
During vehicle operation, the boiling point of the brake 
fluid is continuously reduced through the absorption of 
moisture from the atmosphere. Under extremely hard 
operating conditions, this moisture content can lead to 
the formation of bubbles in the system thus reducing 
the system‘s efficiency.
The brake fluid must therefore be replaced every two 
years, preferably in the spring.
It is recommended to use only brake fluid approved by 
Mercedes-Benz. Your authorized Mercedes-Benz Center 
will provide you with additional information.