The back of my passenger seat on my 260E wont roll up. Its stuck laying back pretty far. Its all manual, no electrical. The roller on the left side of the seat freely spins. If you pull it out to adjust the headrest, it wont work either just spins. Something inside must have broke. How do I get to the internal parts so I can see whats wrong? If anyone knows what broke, can you tell me? Thanks.

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1989 260E
- 300E engine
1998 C230
1995 E320

........bump

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1989 260E
- 300E engine
1998 C230
1995 E320