Retractable Rear Headrest

NOTE: Retractable rear headrest is only available on S320, S420 and S500 models.

NOTE: Ensure related fuses are not blown and voltage to all control modules is okay. See WIRING DIAGRAMS .

Turn ignition switch to RUN position. Extend both rear headrests. Press retractable headrest unlocking switch. Both rear headrests should retract. If both rear headrests do not retract and pump in PSE control module does not run, check the following as possible cause and repair as necessary:

Check wiring. See WIRING DIAGRAMS .
Using Hand-Held Tester (965 589 00 01 00), check PSE control module version coding.
Suspect faulty PSE control module.

If both rear headrests do not retract and pump in PSE control module runs, check the following as possible cause and repair as necessary:

Perform retractable rear headrest system TEST 1: RETRACTABLE REAR HEADREST UNLOCKING CIRCUIT. See RETRACTABLE REAR HEADREST under SYSTEM TESTS .
Perform retractable rear headrest vacuum TEST 1: RETRACTABLE REAR HEADREST SYSTEM VACUUM TEST. See RETRACTABLE REAR HEADREST under VACUUM SYSTEM TESTS .
Perform pneumatic system vacuum TEST 10: REAR HEADREST VACUUM SUPPLY. See PNEUMATIC SYSTEM EQUIPMENT under VACUUM SYSTEM TESTS .
Repair mechanical fault.