hello wanted to change the clutch a few days ago, so gear out,backrest clipped,pressure plate out and pulley off so then the co-driver slide seemed funny to me because there was a piece of iron/steel missing from scratch then new clutch and etc. built-in wanted to start motor then short crashing noise, tried again and again to start but didn’t go, then gears made everything off again and found that swing wheel stuck and now determined the intersection n swing wheel and behind the cover a iron/steel piece had jammed.now my question how do I get the cover behind the swing wheel? this is a MB 814 bj1993(older model) and in this cladding also depends on the clutch sensor cylinder (only as a hint) thank you in advance for helpful answers. gearbox picture attached (as stop point)