Mercedes-Benz SLR-Class 2005 - Manual (Page 253)

252
Operation
Trunk
3 Cap for windshield washer reservoir
Opening washer fluid reservoir
̈ Pull up cap 3 by the tab.
Closing washer fluid reservoir
̈ Press cap 3 on to the filler neck until
it engages fully.
For more information, see “Windshield and
headlamp washer system” (
୴ page 382).