LI27.19-P-056610

M276 MY2013 and MY2014 - Harsh Shifts: 4-3, 4-5
Topic number
LI27.19-P-056610
Version
5
Design group
27.19 Transmission - electrical system
Date
06-13-2014
Validity
Model Year 13 & 14 Vehicles with M276 and Transmission control unit VGS3 & 4
Reason for change
Added additional Models to Validity
Reason for block
Complaint:
Harsh 4-3 and/or 4-5 shifts may be experienced, usually more noticeable with light throttle drivers. No check engine
light etc. or related diagnostic fault codes. Adaptation values are usually within specification.
Cause:
System software can adapt poorly under certain driving conditions. Shift member K2 will become overfilled leading to
a harsh shift.
Remedy:
Please update the Transmission Control Unit to the software referenced in the attachment or newer
After performing the update, save an EEPROM log from the transmission. Clear adaption values and take vehicle for
new adaptation drive. Save an EEPROM log after adaptation.
Resetting of adaptation values: VGS - Fully integrated transmission control (Y3/8n4) -> Adaptations -> Teach-in Process -> Resettinf of adaptation values ->Shift -> Confirm reset of adaptation with Yes
Attachments
File
Description
M276 NAG2 Transmission Software.pdf
NAG2 Transmission Software list
Symptoms
Power transmission / Automatic transmission / Automatic transmission - function / Shifting is rough
Work units
Op. no.
Operation text
54-0650
BATTERY CHARGER, MAINTAIN VOLTAGE
54-1011
SHORT TEST
06-13-2014 2:21 PM
© Copyright Daimler AG
Time
PARKEGL
Damage
code
Note
54553 90
Control unit, transmission
Page 1/2
54-0991
TRANSMISSION SOFTWARE UPDATE
27-1047
TRANSMISSION ADAPTATION
Validity
Vehicle
Engine
Transmission
C (204)
276
722
E (207)
276
722
E (212)
276
722
GLK (204)
276
722
SLK (172)
276
722
06-13-2014 2:21 PM
© Copyright Daimler AG
PARKEGL
Page 2/2