Mercedes-Benz A-Class Operator's Manual page 118

116 Light and visibility
Remove protective film 1 from the mainte‐
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nance display on the tip of the newly instal‐
led wiper blades.
If the color of the maintenance display changes
from black to yellow, the wiper blades should be
replaced.
% The duration until the color change varies
depending on the usage conditions.
Replacing the rear window wiper blade
Removing the wiper blade
Switch off the ignition.
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Fold wiper arm 2 away from the rear win‐
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dow until it engages in the change position.
Unclip wiper blade 1 on wiper arm
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remove it in the direction of arrow 3.
Installing the wiper blade
Position wiper blade
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2 and
holder 2 on the wiper arm.
Press wiper blade 1
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arrow 4 until it engages in holder 2.
Make sure that wiper blade
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Fold the wiper arm from the change position
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back onto the rear window.
1 with both lugs 3 on
in the direction of
1 sits correctly.