125000663 - O05 FRONT SEAT HEIGHT ADJUSTMENT NOT WORKING

The seat will not go up or down when the lever is operated
Test the mechanism with someone sitting on the seat.
Results of the tests
1MECHANISM OPERATION CHECKAll OKProblems metOperation
Remove the outer seat guard Op.    Op. 7045A43 SEAT EXTERIOR GUARD - R R. Check that there are no obstacles or foreign materialContinue to Step 2Presence of obstacles or dirt alogn the device mechanismClean the device and restore operation
2CHECKING SEAT RETAINING SYSTEMAll OKProblems metOperation
Check condition of the lever retaining system and the seat lift ratchetContinue to Step 3Lever or retaining elements brokenReplace the lever or other affected parts Op.    Op. 7045A36 DRIVERS SEAT MANUAL HEIGHT ADJUSTMENT DEVICE - R R.
Parts incorrectly fastenedRestore the correct fixing
3CHECKING SEAT LIFT DEVICEAll OKProblems metOperation
Remove the outer seat guard Op.    Op. 7045A43 SEAT EXTERIOR GUARD - R R. Check the seat lift device. In particular, check the condition of the device gear teeth and ensure it is properly secured.Continue to Step 4Device faultyRepair or replace the device Op.    Op. 7045A36 DRIVERS SEAT MANUAL HEIGHT ADJUSTMENT DEVICE - R R.
4Continue as instructed by the testerAll OKProblems metOperation
Check that the fault is no longer presentEnd of diagnosis.