Mercedes-Benz SL 2015 Owner's Manual page 84

Problems with the key
Problem
You can no longer lock or
unlock the vehicle using
the key.
You can no longer lock or
unlock the vehicle using
KEYLESS-GO.
Possible causes/consequences and M M Solutions
The key battery is discharged or nearly discharged.
Check the key battery (
X
( page 80).
Y
If this does not work:
Unlock ( page 84) or lock (
X
Y
emergency key element.
There is interference from a powerful source of radio waves.
Unlock ( page 84) or lock (
X
Y
emergency key element.
The key is faulty.
Unlock ( page 84) or lock (
X
Y
emergency key element.
Have the key checked at a qualified specialist workshop.
X
KEYLESS-GO has been deactivated.
Reactivate KEYLESS-GO (
X
The key battery is discharged or nearly discharged.
Check the key battery (
X
( page 80).
Y
If this does not work:
Unlock ( page 84) or lock (
X
Y
emergency key element.
There is interference from a powerful source of radio waves.
Unlock ( page 84) or lock (
X
Y
emergency key element.
There is a fault with KEYLESS-GO.
Lock/unlock the vehicle using the remote control function of the
X
key.
Have the vehicle and key checked at a qualified specialist work-
X
shop.
If the vehicle cannot be locked/unlocked even using the remote con-
trol function:
Unlock ( page 84) or lock (
X
Y
emergency key element.
Have the vehicle and key checked at a qualified specialist work-
X
shop.
page 80) and replace if necessary
Y
page 84) the vehicle using the
Y
page 84) the vehicle using the
Y
page 84) the vehicle using the
Y
page 78).
Y
page 80) and replace if necessary
Y
page 84) the vehicle using the
Y
page 84) the vehicle using the
Y
page 84) the vehicle using the
Y
Key
81
Z