Page 146 of 354

143 Audio system
Te ch n i c a l
data Instruments 
and controlsOperationDrivingInstrument 
cluster displayPractical hints Car care Index Cassette mode 
Note:
Vehicles equipped with the COMAND system do not 
come with a factory installed cassette mechanism. 
A standard 1/8” stereo phono plug for auxiliary audio 
input (located in glove box) is provided for connection of 
a portable battery operated cassette player or any other 
portable device which uses a headphone output. Please 
refer to the COMAND operating manual for information 
concerning the activation of the audio input.Playing cassettes
Press the “TAPE” button. When the eject (EJ) key is 
pressed, the display folds down and the cassette slot 
becomes visible. Push the cassette into the slot until it 
engages. The cassette will be pulled in automatically.
Notes:
Do not press directly on the radio display face.
Return the display panel to its normal position by 
folding it back up and pressing gently on the display 
frame to lock in place. 
When playing mono recorded tapes (e.g. books) through 
a stereo system the sound from one track might bleed to 
the other track, despite setting the balance to the full 
left or full right speakers. 
     
        
        Page 244 of 354
241 Check regularly and before a long trip
Te ch n i c a l
data Instruments 
and controlsOperationDrivingInstrument 
cluster displayPractical hints Car care Index Check regularly and before a long trip
E 320 shown1Windshield washer system
For refilling reservoir see page 276.
2Headlamp cleaning system
Auxiliary tank connected to windshield washer 
reservoir. Open filler caps on both reservoirs during 
refilling.
3Coolant level
See “Adding coolant”, page 275.
4Engine oil level
See “Checking engine oil level”, page 273.
5Brake fluid
See “Brake fluid”, page 330.
Opening hood, see page 270.
Ve h i c l e  l i g h t i n g : Check function and cleanliness. For 
replacement of light bulbs, see “Exterior lamps” on 
page 297.
Exterior lamp switch, see page 119.
3
2
4
1
5 
     
        
        Page 261 of 354
258 Malfunction and warning messages
Te ch n i c a l
data Instruments 
and controlsOperation DrivingInstrument 
cluster displayPractical hints Car care Index
LIGHTING SYSTEMWhen the message appears after starting the engine, or 
if it come on while driving, this indicates a failure in the 
parking lamp, taillamp, stop lamp, or low beam 
headlamp. See page 297 for instructions on replacing 
bulbs.
If an exterior lamp fails, the message will appear only 
when that lamp is switched on.
If a brake lamp fails, the message will appear when 
applying the brake and stays on until the engine is 
turned off.
Note:
If additional lighting is installed (e.g. auxiliary 
headlamps etc.) be certain to connect into the fuse 
before the failure indicator monitoring unit order to 
avoid damaging the system.
Line 1 Line 2
LAMP DEFECTIVE CHECK LAMPS!
DISPLAY DEFECTIVE VISIT WORKSHOP! 
     
        
        Page 271 of 354
268 Fuses
Te ch n i c a l
data Instruments 
and controlsOperation DrivingInstrument 
cluster displayPractical hintsCar care Index
2Lock for auxiliary fuse box and battery cover
3Fuse box and battery cover4Auxiliary fuse box below right rear bench seat
To gain access, fold seat cushion forward. Rotate lock (2) 
counterclockwise and remove cover.
Note:
When reinstalling cover (3) make certain that tabs 
(arrows) are inserted.
4
P54.15-2128-26 
     
        
        Page 272 of 354
269 Fuses
Te ch n i c a l
data Instruments 
and controlsOperation DrivingInstrument 
cluster displayPractical hintsCar care Index 5Auxiliary fuse box to left of exterior lamp switch
To again access, open door, pry off cover and 
remove.Electrical outlet
The electrical outlet is located in the rear compartment 
on the left side.
To gain access, flip cover up. If locked, first unlock by 
inserting for instance a small coin and turning it to the 
left.
Note:
The cover is lockable by inserting, for instance a small 
coin and turning it to the right.
Maximum capacity: 180 W.
5
P82.00-2029-26 
     
        
        Page 279 of 354
276 Engine compartment
Te ch n i c a l
data Instruments 
and controlsOperation DrivingInstrument 
cluster displayPractical hintsCar care Index
Windshield and headlamp washer system
E 320 shown
1Windshield washer fluid reservoir
Capacity approximately 5.8 US qt (5.5 l)
2Headlamp cleaning fluid reservoir
Auxiliary tank connected to windshield washer 
reservoir. Open filler caps on both reservoirs during 
refilling.
Capacity approximately 1.9 US qt (1.8 l)Windshield and headlamp washer fluid mixing ratio
For temperatures above freezing:
MB Windshield Washer Concentrate “S” and water.
1 part “S” to 100 parts water
(40 ml “S” to 1 gallon water).
For temperature below freezing:
MB Windshield Washer Concentrate “S” and 
commercially available premixed windshield washer 
solvent / antifreeze.
1 part “S” to 100 parts solvent
(40 ml “S” to 1 gallon solvent).
1
2