Mercedes-Benz 2000 SL-Class - Manual (Page 227)

223 Coolant level
Technical
data
Instruments
and controls
Operation Driving
Instrument
cluster display
Practical hints Car care Index
Coolant level
1 Cap for coolant reservoir
The coolant level can be checked visually at the
transparent coolant reservoir.
To check the coolant level, the vehicle must be parked
on level ground.
Check coolant level only when coolant is cold:
The coolant should reach the rib in the filler neck. Also
see marking (arrow) on reservoir.