Mercedes-Benz CLA Operator's Manual page 91

If the side window opens again slightly:
Immediately pull the corresponding switch
X
on the door control panel until the side win-
dow is completely closed (
Hold the switch for an additional second.
X
If the corresponding side window remains
X
closed after the button has been released,
the side window has been reset correctly. If
this is not the case, repeat the steps above
again.
page 87).
Y
Side windows
Z
89