Mercedes-Benz 2002 SLK 320 - Manual (Page 199)

196 Engine compartment
Technical
data
Instruments
and controls
Operation Driving
Instrument
cluster display
Practical hints Car care Index
Automatic transmission fluid level
The transmission has a permanent fill of automatic
transmission fluid.
Regular automatic transmission fluid level checks and
changes are not required. For this reason the dipstick is
omitted.
If you notice fluid loss or gear shifting malfunctions,
have your authorized Mercedes-Benz Center check the
transmission fluid level.