Interior, A/C - Heated Seats Inoperative
HEATED SEATS NONFUNCTIONALTopic number LI91.30-P-048345
Version 1
Design group 91.30 Seat heater, seat ventilation
Date 11-18-2009
Validity R 171 all VIN as of ....00001 up to .....166314 with SA code
873
R 171 AMG, VIN as of ....00001 with SA code 873
R 171 Designo, VIN as of ....00001 with SA code 873 + X00/X50
Reason for change Validity adjusted. All veh. except AMG&Designo have been technically modified / Supersedes DTB P-B-91.30/146
Reason for block
Complaint:
Heated seats nonfunctional
Cause:
The seat heating leaks at the side of the seat cushion break as a result of frequent entry/exit.
Remedy:
1.) Please expose the seat heating contacts:
To do so, the seat cushion must be removed in the way described in AR91.10-P-3310V.
2.) Then disconnect the main supply connector for the heated seat from the seat separation point. Disconnect the black and white connectors at the side.
3.) The black main connector plug (see picture 1, item 1) with the catch tab is the connector of the heating element for the front seat cushion.
4.) Please check the resistance of the seat cushion heating element.
a) If the resistance is lower than 10 ohm, the cushion heating element is OK.
b) If the resistance is higher than 10 ohm, the cushion heating element is broken.
5.) If the cushion heating element is defective, please disconnect the secondary connector plug from the base and side bolster (see picture 2, item 2).
6.) Please check the resistance of the heating element in the individual heating panels (left, center and right in each panel).
a) If the resistance is lower than 5 ohm, the cushion heating panel concerned is OK.
b) If the resistance is higher than 5 ohm, the cushion heating panel concerned is broken.
The side bolster heating panels are available as individual parts from the Replacement Parts department; for this reason, replacement of the complete seat cushion is no longer permitted.
Detailed work instructions (AR91.30-P-0007V) describing how to replace the side bolster heating panels are available.
Attachments
Symptoms
Parts
Work units
WIS-References
Validity
Attachment - Main connector plug for heated seat cushion
Attachment - Secondary plug connecting side bolster to mirror