Rear M2 car B4 doors not proven closed.TC opened and closed train doors once - ok ~~~~~ Rear M2 (2608) car B4 doors not proven closed. TC opened and closed train doors once - ok And 1608 B3 door slow in closing. CE checked:All doors proven closed n no DIR lit Depot please follow up.  1608 B3 door found LHS outer main roller delaminated, replace roller done. check DLS, DLD rubber cushion ok, Door matting ok.Service/Check guide rail, Jrail ok. Door cyclic open/Closed ok. static test ok Other findings 1608 B1 RHS outer main roller delaminated, Replace done. B2 found wobble due to FOD at RHS Jrail, Remove FOD done. Check DLS, DLD rubber cushion ok, Door matting ok.Service/Check guide rail, Jrail ok. Door cyclic open/Closed ok. static test ok Done by Saini/Asruddin/Haslan 45168 2608 B1,B2,B3, B4 door heavy vibration  2608 B1 LHS, B3 RHS and B4 RHS outer door roller delaminated/Damage change out done. B2 roller check ok. Mattin strip criteria out 65.9, After adjusted 63.4 ok. Check DLS, DLD rubber cushion ok, Push/pull ,Door matting ok.Service/Check guide rail, Jrail ok. Door cyclic open/Closed ok. static test ok Done by Rizman/Koh/Sanip/Jack 31.08.23