Mercedes-Benz 190 E 2.6 1989 Owner's Manual page 29

| Press for fresh air ventilation or air conditioning.
For taking in fresh air or during air conditioner operation,
the air is directed to outlets (5) and (7). Adjust the air flow
with levers (6) and (8) respectively as desired.
In this setting, the Tempmatic Climate Control System is
shut off, including the fresh air supply to the interior of
the car (to prevent entrance of odors, i.e. while driving
through tunnels, etc. or to prevent the entrance of water
from automatic car wash). Use this setting only tempo­
rarily while driving with windows and sliding roof closed
since the vehicle's normal interior airflow will be dis­
rupted.