Mercedes-Benz 190D 2.2 1984 Owner's Manual page 27

Press fo r fresh air ve n tila tio n o r air c o n d itio n in g .
For ta kin g in fresh air or d u rin g a ir c o n d itio n e r o p era­
tio n , the a ir is d ire cte d to o u tle ts (6) and (8). A d ju st
the a ir flo w w ith levers (7) and (9) respectively as
desired.
iH Press to sh u t o ff a ir entry.
Fresh a ir in to the veh icle is s h u t off. Use th is bu tto n to
p re ven t o u tsid e odors, o r w a te r from car washes from
e n te rin g th e v e h ic le 's in te rio r, fo r exam ple. Do not
d rive the ve h ic le w ith th is se ttin g fo r long periods w ith
w in d o w s and s lid in g ro o f closed since the v e h ic le 's
norm al in te rio r a irflo w w ill be disrup ted .
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