A/T - Hard 5-4 Downshift When Cold
Hard 5-4 downshift when coldTopic number LI27.19-P-054689
Version 1
Design group 27.19 Transmission - electrical system
Date 10-16-2012
Validity Only for W164 with OM642 as of production date 07/2010 (only in combination with the following EHS: A220 270 00 60, A220 270 01 60).
Reason for change
Complaint:
Hard 5-4 downshift when transmission is cold
Cause:
Software release in transmission control unit (TCM)
Remedy:
Flash transmission control unit using Star Diagnosis with the following
add-ons:
For DVD 05/2012 -> add-on 2451 or for DVD 07/2012 -> add-on 2452
Software not valid for model series X164.
Symptoms
Work units