Wiper performance in different situations:  
During automatic 
wipe/wash:  
While the washer system is working, the 
Climatronic switches to recirculation for 
about 30 seconds to help prevent the 
washer fluid odor from entering the vehi-
cle interior.  
During intermittent 
wiping:  
Speed-dependent interval control: The 
higher the vehicle speed, the faster the 
wipers move.  
 
Heated washer nozzles 
The heating thaws frozen washer nozzles, but not the fluid supply 
hoses. When the ignition is switched on, the heat applied to the 
washer nozzles is automatically regulated depending on the outside 
air temperature. 
Headlight washer system 
The headlight washer system cleans the headlight glass. 
If the ignition and the headlights (high or low beams) are switched on, 
the headlights are cleaned the first time and every fifth time the front 
windshield washers are activated. This happens only when the low or 
high beams are on when the windshield wiper lever is pulled towards 
the steering wheel. However, the headlights must still be washed by 
hand periodically (for instance, during refueling) in order to get rid of 
hard-to-remove dirt (like insect splatter). 
To help make sure that the headlight cleaning system works during 
winter weather, always keep the headlight washer nozzles free of 
snow and remove any ice with a deicer spray before driving. Use a 
deicer spray to remove any ice. 
  If there is something on the windshield, the wiper will try to wipe it 
away. If it continues to block the wiper, the wiper will stop moving. 
Remove the obstacle and switch the wiper on again.  
 
  To remove wax and coats of polish safely, we recommend using 
an alcohol-based windshield cleaner. 
Checking and refilling windshield washer fluid 
 
Fig. 96 In the engine compartment: Cap of the windshield washer 
fluid reservoir.