8.11 Air Intake
8.11.1 Service indicator – Signal ring position check
Preconditions
☑ Engine is stopped and starting disabled.
Checking signal ring position
1. Replace air filter if the signal ring (2) is com-
pletely visible in the red area of the observa-
tion window (3) (→ Page 112).
2. After installation of new filter, press reset
button (1).
Result: Signal ring returns to initial position.
114 | Air Intake | MS15018/03E 2016-02
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