Mercedes Benz C 300 4MATIC # LI27-00_P-049253 Date: 100406 A/T - Hard Converter Lock-Up/Hard 1-2 Shift
Mercedes Benz C 300 4MATIC # LI27-00_P-049253 Date: 100406 A/T - Hard Converter Lock-Up/Hard 1-2 Shift Hard 1-2 shift or hard torque converter lockup clutch engagement Topic number LI27.00-P-049253 Version 1 Design group 27.00 General Date 04-06-2010 Validity Transmission 722.9 Reason for change Remedy revised / Supersedes DTB S-B-27.00/112 Reason for block Complaint: The customer complaint of "Hard shift, presumable the 1-2 shift, occurs when moving off" is often received even though the problem is hard 370 engagement of the torque converter lockup clutch (KUB) in the start-off process. In order to permit a clear diagnosis, restrict the transmission to 1st gear by shifting to position 1. If a jolt occurs at the point where the state of the torque converter lockup clutch changes from "open" to "slipping", then the cause should be sought in the control of the torque converter lockup clutch. Cause: Control of torque converter lockup clu...