Problems With The Smartkey; Prerequisites - Mercedes-Benz E-Class Operator's Manual

58 Opening and closing

Prerequisites

You require a CR 2032 3 V cell battery.
Mercedes-Benz recommends that you have the
battery replaced at a qualified specialist work‐
shop.
Remove the emergency key (
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Problems with the SmartKey

Problem
You can no longer lock or unlock the
vehicle.
Press release button
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remove cover 1.
Remove battery compartment 3.
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Insert the new battery into battery compart‐
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ment 3. Observe the positive pole marking
page 57).
in the battery compartment and on the bat‐
→
tery.
Push in battery compartment 3.
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Replace cover
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Possible causes/consequences and
Possible causes are:
The SmartKey battery is discharged or nearly discharged.
R
There is interference from a powerful radio signal source.
R
2 down fully and
1 so that it engages.
M Solutions