Mercedes Benz 2007 r 320 cdi User Manual

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If the batteries in the SmartKey or the 
SmartKey with KEYLESS-GO* are 
discharged, the vehicle can no longer be 
locked or unlocked. It is recommended to 
have the batteries replaced at an autho-
rized Mercedes-Benz Light Truck Center.

Batteries contain materials that can harm 
the environment if disposed of improperly. 
Recycling of batteries is the preferred 
method of disposal. Many states require 
sellers of batteries to accept old batteries 
for recycling.

Replacement batteries: Lithium, type 
CR 2025 or equivalent.

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Remove the mechanical key from the 
SmartKey (

page 478).

1 Mechanical key
2 Battery compartment

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Insert mechanical key 

1 into opening.

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Press mechanical key 

1 in direction of 

arrow.

The battery compartment is unlatched.

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Pull battery compartment 

2 out of the 

SmartKey housing.

3 Batteries
4 Contact springs

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Pull out batteries

3.

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Using a line-free cloth, insert new bat-
teries 

3 under contact springs 4 with 

the positive terminal (+) side facing up.

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Return battery compartment

 2 into 

housing until it locks into place.

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Slide mechanical key 

1 back into 

SmartKey.

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Check the operation of the SmartKey 
or SmartKey with KEYLESS-GO*.

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Keep the batteries out of reach of children.

If a battery is swallowed, seek medical help 

immediately.

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