Unintentional opening of the tailgate - recoding of long press on double-click
Topic number

LI72.20-P-075746

Version

4

Function group

72.20 - Tailgate, rear door

Date

2/24/26

Validity

118, 167, 177, 206, 213, 223, 238, 243, 247, 254, 257,
293, 294, 295, 296, 297, 214, 236, 174, 178 MOPF: 205,
253, 217, 222

Reason for change

Addition of model series 294, 174, 178

Complaint
Tailgate opens unintentionally.

Cause
Accidental or unnoticed activation of the button to open the tailgate on the vehicle key. E.g. when stored in trouser pocket, handbag etc.

Remedy
As of the 6th generation, the vehicle key can be recoded so that the tailgate no longer opens as a result of a long
press on the button, but by double-clicking on the button instead.
This reduces the likelihood of the button being activated accidentally or unintentionally.
The recoding can be carried out as follows:
1. Add SA Code O19 into VeDoc (O for Oscar, not "zero")
• an XSS ticket may be necessary to add the SA code
2. Perform SCN coding of EIS N73 control unit
3. Deactivate the vehicle key (a successful deactivation is indicated by the LED lighting up 2x briefly and then 1x for a
long period).
4. Place the vehicle key in the storage compartment on the key symbol and turn on the ignition. All other vehicle keys
must be outside of the vehicle when doing this!
Perform steps 3 and 4 successively for all vehicle keys.
Notes:
6th, 7th and 8th generation keys can be deactivated as follows:
24.02.2026 15:26
© Copyright Mercedes-Benz AG

SAHARRY

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Up to modification year 22/1 double-click on the locking button
As of modification year 22/1, by pressing and holding the locking button + double-clicking on the release tab
On model series 167, the storage compartment with the key symbol is located in the armrest.
The SCN coding from the EZS is only transferred correctly to the vehicle key under the following conditions: Only one
vehicle key is located in the vehicle, this key has been deactivated and it is positioned on the marking in the storage
compartment for the data transfer.
The costs for this adaptation are to be borne by the customer.

Attachments
File

Description

Gen 6+7+8 Key.png

Disclaimer
NOTE: The information contained in this document is intended for use by trained, professional technicians with the
knowledge to properly and safely perform diagnosis and repairs on Mercedes-Benz vehicles, using Mercedes-Benz
approved tools and equipment. It informs service technicians about conditions that could occur in certain vehicles and
provides information that could assist in proper vehicle diagnosis, service, or repair. It does not indicate that a defect
is present in any vehicle referenced in this document nor does it imply warranty coverage. DO NOT assume that a
symptom or condition, or a described cause of a symptom or condition, affects any particular vehicle or groups of vehicles, or that a described repair applies to any particular vehicle or groups of vehicles. There can be multiple causes
resulting in the same or similar symptoms or conditions described in this document, and trained professional service
technicians must use their diagnostic skills to make evaluations on a case-by-case basis. The information contained
in this document does not guarantee warranty coverage nor does it extend the vehicle’s warranty in any way.

Symptoms
Body > Door/Flap > Hood/flap > Trunk lid/liftgate > Jumps open
Overall vehicle > Power supply > Fuel cell > Malfunction

Operation numbers/damage codes
Op. no.

Operation text

24.02.2026 15:26
© Copyright Mercedes-Benz AG

Time

SAHARRY

Damage
code

Note

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