Erratic Keyless Go Function Following Replacement Of Keyless Go Keys (TT 12/14-H)

Publication date: 2014-12-18
Reference number: TT 12/14-H

ERRATIC KEYLESS GO FUNCTION FOLLOWING REPLACEMENT OF KEYLESS GO KEYS

PASSENGER CAR TECHNICAL TOPICS; DECEMBER 2014

Reference Number(s): TT 12/14, Date of Issue: December 18, 2014

MERCEDES-BENZ:	All W/ Keyless Go
GROUP:	80.61 - Keyless Go

CAUSE / EXPLANATION

Keys are often lost within the interior of the vehicle without knowledge by the customer or service personnel. When a "replacement key" is ordered as a "duplicate" and both keys are used in the vehicle simultaneously, the KG system may receive crossed signals. Even a key in the trunk can be lost and go undetected as long as a working key present on the user when closing the trunk.

CORRECTION

Consider performing a "key localization" to search for keys lost in the interior OR simply attempt to start the vehicle without the remaining key inside the vehicle.
As a rule, lost keys should be ordered as "additional keys".
It is IMPORTANT to "block" the lost key track(s) thru KG adaptations.