Mercedes Benz 2009 M-Class User Manual

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Extreme care must be exercised since 
your vehicle with a trailer will require 
additional passing distance ahead than 
when driving without a trailer.

Because your vehicle and trailer is 
longer than your vehicle alone, you will 
also need to go much farther ahead of 
the passed vehicle before you can re-
turn to your lane.

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Make sure the automatic transmission 
is set to P (

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page 187).

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Set the parking brake for the vehicle 
(

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page 65).

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Start the engine (

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page 54).

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Close all doors and the tailgate.

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Set the parking brake for the trailer.

G

Vehicles with air suspension package*:

While you are coupling or decoupling a trail-

er, make sure that you do not

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lock or unlock

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open or close

a vehicle door or the tailgate.

The vehicle’s level could change and you 

could endanger yourself and/or others as a 

result.

Make sure that you do not operate the ADS 

button* (

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page 269) or the vehicle level 

control system* (

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page 270) when cou-

pling/decoupling the trailer.

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Vehicles with air suspension package*:

As soon as you disconnect the electrical 

connection between the trailer and the 

vehicle, the vehicle will lower. To help avoid 

personal injury, make sure no one is near 

the wheel housing or underneath the vehicle 

before the electrical connection is discon-

nected.

When you uncouple the trailer, the vehicle is 

temporarily raised because the springs are 

relieved of load. Be especially careful during 

this process, as you could otherwise injure 

yourself and/or others. Make sure that any 

persons remaining in the vehicle do not 

press the switches for vehicle level control 

or the ADS*.