2000 MERCEDES-BENZ C-Class Heat

Automatic Climate Control
(Models C 280 and C43 AMG)



The system is always at operational readiness, except when manually
switched off. The automatic climate control only operates with the engine
running. The temperature selector should be left at the desired temperature
setting.
The temperature selected is reached as quickly as possible. The system
will not heat or cool any quicker by setting a higher or lower temperature.


1. Air volume control for center air outlet,
turn wheel up to open
2. Air volume control for side air outlet.
To open air outlets:
Turn wheel to position
3. Center air outlets, adjustable
4. Side air outlets, adjustable
5. Display and Controls



The automatic climate control removes considerable moisture from the air during operation in the cooling mode.
It is normal for water to drip on the ground through ducts in the underbody.

Important !
This vehicle is equipped with an air conditioner system that uses HFC-134a (HFC hydrofluorocarbon) as a refrigerant.
Repairs should always be performed by a qualified technician, and refrigerant should be collected in a recovery
system for recycling.

Display and Controls
Press to activate, indicator lamp is on while activated.
Automatic mode Air recirculation
Raise temperature Air distribution, manual
Lower temperature Economy mode
Defrost Air volume, manual
Rear window defroster Residual engine heat
utilization
Basic Setting - Automatic Mode
Press button for automatic mode.
Simultaneously press both
and button for temperature setting of 72°F.



Air volume and distribution are controlled
automatically. This setting can be used all year
around.

Economy
The function of this setting corresponds to the
automatic mode. However, because the air
conditioning compressor will not engage (fuel
savings), it is not possible to air condition in this
setting.
Press button to activate.
Press button once again to return to previous
setting.

Special Settings
(use only for short duration)
Defogging Windows
Switch off button.
Press . button.
Press button repeatedly until
air is directed upward.
Turn wheels (2) to position
to open left and right air outlets (4).
Adjust air outlets upward.

Defrosting
Turn wheels (2) to position to
open left and right air outlets (4).
Adjust air outlets upward.
Press button. Maximum heat-
ed and automatically controlled
amount of air is directed to the
windshield and side windows.
Press button once again to
return to previous setting.
Rear Window Defroster
Turn key in steering lock to position 2.
To select, press button.
To cancel, press button again.
Note:
Heavy accumulation of snow and
ice should be removed before
activating the defroster.
The rear window defroster uses a
large amount of power. To keep
the battery drain to a minimum, turn
off the defroster as soon
as the window is clear.
The defroster is automatically turned
off after a maximum of
12 minutes of operation.
If several power consumers are
turned on simultaneously, or the
battery is only partially charged, it
is possible that the defroster will
automatically turn itself off. When
this happens, the indicator lamp
inside the switch starts blinking.
As soon as the battery has
sufficient voltage, the
defroster automatically turns
itself back on.
Air Distribution
Press button repeatedly until
the requested symbol is displayed.

Air Volume
Press - or + side of rocker switch
until the requested blower
speed is attained.
A choice of 7 blower speeds is
available. To switch the
automatic climate control off,
press - side of rocker switch
until symbol OFF is displayed.
The fresh air supply to the car
interior is shut off.
While driving, use this setting only
temporarily, otherwise the
windshield could fog up.
To switch the automatic climate
control on again, press
or + side of

Air Recirculation
This mode can be selected to prevent annoying odours or dust from entering the car's interior.
Outside air is not supplied to the car's interior.
To select, press button.
To cancel, press button again.
The system will automatically switch from recirculated air to fresh air
• after approx. 5 minutes at outside temperatures below approx. 40°F (5°C),
• after approx. 30 minutes, at outside temperatures above approx. 40°F (5°C),
• after approx. 5 minutes, if button is pressed.
Notes:
If the windows should fog up from the inside, switch from recirculated air back to fresh air.
At high outside temperatures, the system automatically engages the recirculated air mode thereby
increasing the cooling capacity performance, switching to partially fresh air within 20 minutes.


Dust Filter
Nearly all dust particles and pollen are filtered out before outside air enters the
passenger compartment through the air distribution system.
Notes:
Do not obstruct the air flow by placing objects on the air flowthrough exhaust slots below the rear
window.
Also keep the air intake grille in front of windshield free of snow and debris.


Residual Engine Heat Utilization
With the engine switched off, it is possible to continue heating the interior for a short while.
Air volume and distribution are controlled automatically
To select:
Turn electronic key in steering lock to position 1 or 0 or remove electronic key.
Press button.
This function selection will not activate if the battery charge level is insufficient.
To cancel:
Press button.
The system will automatically shut off
• if you turn electronic key in steering lock to position 2,
• after approx. 30 minutes,
• if the battery voltage drops.

Heated Seats (optional)

Heated Seats (optional)

The front seat heater can be switched on with the electronic key in steering lock
positions 1 or 2.
Press switch to turn on seat heater:
1. Normal seat heating mode. One indicator lamp in the switch lights up.
2. Rapid seat heating mode. Both indicator lamps in the switch light up. After
approximately 5 minutes in the rapid seat heating mode, the seat heater automatically
switches to normal operation and only one indicator lamp will stay on.

Turning off seat heater:
If one indicator lamp is on, press upper half of switch.
If both indicator lamps are on, press lower half of switch.
If left on, the seatheater automatically turns off after approximately 30 minutes of operation.

Note:
When in operation, the seat heater consumes a large amount of electrical power. It is not advisable to use the seat
heater longer than necessary. The seat heaters may automatically switch off if too many power consumers are
switched on at the same time, or if the battery charge is low. When this occurs, the indicator lamp in the switch will
blink (both indicator lamps blink during rapid seat heating mode). The seat heaters will switch on again automatically
as soon as sufficient voltage is available. If the blinking of the indicator lamps is distracting to you, the seat heaters
can be switched off.

Steering Lock

0 - The electronic key can be withdrawn in this position only. The steering is locked with the electronic key removed
from the steering lock. The electronic key an be removed only with the selector lever in position "P" and the foot off
the brake pedal. After removing the electronic key or with the electronic key in steering lock position 0, the
selector lever is locked in position "P".
1 - Steering is unlocked. (If necessary, move steering wheel slightly to allow the electronic key to be turned clockwise
to position 1.) Most electrical consumers can be operated. For detailed information see respective subjects.
2 - Driving position.
3 - Starting position.

Refer to Index for Starting and turning off the engine.


Warning !
When leaving the vehicle always remove the electronic key from the steering lock, and lock the vehicle.
Do not leave children unattended in the vehicle, or with access to an unlocked vehicle.
Unsupervised use of vehicle equipment may cause serious personal injury.


Important !
If the electronic key is left in the steering lock position 0 for an extended period of time, it can no longer be turned
in the lock. In this case, remove electronic key from steering lock and reinsert.

Notes:
A warning sounds when the driver's door is opened with the electronic key in steering lock position 1 or 0. With the
engine at idle speed, the charging rate of the alternator (output) is limited. It is therefore recommended to turn off
unnecessary electrical consumers while driving in stop-and-go traffic. This precaution helps to avoid draining of the
battery. Unnecessary strain on the battery and charging system may be minimized by turning off the following power
consumers, for example: Heated seats, rear window defroster. In addition, the automatic climate air volume control
should be set to the lowest position. The steering lock can only be unlocked with the vehicle battery properly
connected.

Caution !
To prevent accelerated battery discharge and a possible dead battery, always remove the electronic key from the
steering lock. Do not leave the electronic key in steering lock position 0.

Combination Switch

1. Low beam (exterior lamp switch position )
2. High beam (exterior lamp switch position )
3. High beam flasher (high beam available independent of exterior lamp switch position)
4. Turn signals, right
5. Turn signals, left
To signal minor directional changes, such as changing lanes on a highway, move combination switch to the point
of resistance only and hold it there. To operate the turn signals continuously, move the combination switch past the
point of resistance (up or down). The switch is automatically cancelled when the steering wheel is turned to a large
enough degree.

6 Control for windshield wiper/washer system:
Push briefly for a single wipe without adding washer fluid (use only when windshield is wet)
Push past detent point:
• windshield washer system
• optional headlamp cleaning system (only in exterior lamp positions or ).
When the washer system is activated, the wipers also operate for a limited time.
7 Windshield wiper
0 Wiper off
I Intermittent wiping (optional rain sensor:
One initial wipe, pauses between wipes are automatically controlled by a rain sensor
monitoring the wetness of the windshield.)
II Normal wiper speed
III Fast wiper speed

Note:
The windshield washer reservoir, hoses and nozzles are automatically heated.

Exterior Rear View Mirrors

The switch is located on the center console.
Turn electronic key in steering lock to position 2.
First select the mirror to be adjusted - press button:
Left mirror
Right mirror
To adjust, toggle the switch forward, backward or to either side. With the electronic key in steering lock position 2, the
driver's side mirror reflection brightness responds to changes in light sensitivity. With gear selector lever in position
"R",
or with the interior lamp switched on, the driver's side mirror brightness does not respond to changes in light
sensitivity.

Warning !
Exercise care when using the passenger-side mirror. The passenger-side exterior mirror is convex
(outwardly curved surface for a wider field of view). Objects in mirror are closer than they appear.
Check your inside rear view mirror or glance over your shoulder before changing lanes.
Notes:
The exterior mirrors have electrically heated glass. The heater switches on automatically, depending on outside
temperature. If an exterior mirror housing is forcibly pivoted from its normal position, it must be repositioned by
applying firm pressure until it snaps into place.