I have a 2001 C320 Sport. When I start the car after it has been
stopped for a while (i.e., not EVERY time I start it), I get about four
or five loud mechanical clicks coming from under the dash. I can put
my hands on the dash and feel the click from around the steering
column/ignition switch. It stops after four of five clicks. I see no
other probelms with any other functions. I haven't taken it in yet for
service, but will soon and I wanted to see if anyone has any ideas of
what it might be.
Early cars used vacuum elements to open and close the heater box doors.
The C class uses stepper motors to open and close the doors [and the ML also].
The stepper motors are electric motors that rotate a gear drive to move the
on whether you have the tempmatic or automatic system, determines the amout of
motors. If I remember right; tempmatic [manual blower speed] has 7 and automatic
[blower speed] has
When the gear drive breaks, the motor is moving it but it just clicks. The
biggest failure flap is
the left footwell flap, just above and to the right of the gas pedal.
Both systems have the left footwell motor. The automatic system has a right side
The repair involves a gear drive repair kit and removing the dash. 8 - 8.5 hour
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