Blocked windshield wiper, Windshield wiper smears, Windshield and headlamp washer fluid mixing ratio – Mercedes-Benz 2000 SL-Class User Manual
Page 92: For temperatures above freezing, Mb windshield washer concentrate, 1part, 40ml, For temperature below freezing

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Combination switch
Technical
data
Instruments
and controls
Operation
Driving
Instrument
cluster display
Practical hints
Car care
Index
Blocked windshield wiper
If the windshield wiper becomes blocked (for example,
due to snow), switch off the wiper.
For safety reasons before removing ice or snow, remove
key from steering lock. Remove blockage.
Activate combination switch again (key in steering lock
position 1).
Windshield wiper smears
If the windshield wiper smears the windshield, even
during rain, activate the washer system as often as
necessary. The fluid in the washer reservoir should be
mixed in the correct ratio.
Windshield and headlamp washer fluid mixing ratio
For temperatures above freezing:
MB Windshield Washer Concentrate “S” and water
1 part “S” to 100 parts water
(40 ml “S” to 1 gallon water).
For temperature below freezing:
MB Windshield Washer Concentrate “S” and
commercially available premixed windshield washer
solvent/antifreeze
1 part “S” to 100 parts solvent
(40 ml “S” to 1 gallon solvent).