If you search online, there's an entire write-up with pics on a 5-speed swap for a w124 (should be almost the same for you). Its on mymbonline, and I believe done by AOK Motorsport. Here's the parts list they had:
Mercedes Benz 300E/300CE/300TD 4 Speed Automatic to 5 Speed Manual Swap
List of Parts Needed:
103 030 1205 - Single Mass Flywheel
011 250 0903 - Clutch Disc 8.5"
004 250 3104 - Pressure Plate for 8.5" Clutch Disc
912004-008102 - Pressure Plate Screw washers - NOTE: You need six (6) of these
000912-008012 - Pressure plate screws - NOTE: You need six (6) of these
001 250 2415 - Throwout Bearing
115 980 0115 - Pilot Bearing
201 260 23 33 - Shift Linkage 5th/Reverse
201 260 22 33 - Shift Linkage 3rd/4th
201 260 21 33 - Shift Linkage 1st/2nd
000 994 29 60 - Shift Linkage end clips - NOTE: You need six (6) of these
201 540 1568 - Speedometer Cable 1490mm - Note: Some models already have this length of cable. Remove from auto trans and install on 5 speed. They are interchangeable
001 295 6806 - Clutch Master Cylinder
201 290 0311 - Clutch slave cylinder
129 410 0601 - Front Driveshaft for COUPE
124 242 0501 - Transmission mount for 5 speed manual - NOTE: auto and manual use different mounts!
304017-010036 - Bellhousing Bolts - NOTE: You MAY reuse removed bellhousing bolts
304017-010035 - Bellhousing Bolts for starter - NOTE: You need two (2) of these. You MAY reuse bolts.
124 267 0097 - Shifter boot
B6 6 26 8109 - Gearshift Knob with leather boot
124 295 0513 - Clutch Line
203 997 3182 - Hose From Reservoir to Master Cylinder 270mm
124 683 0306 - Shifter Frame for Shift boot to center console wood (5 speed version)
XXX XXX XXXX - Shifter - NOTE: Will need corresponding shifter for particular transmission. They have different shift patterns that the shifter assemblies are designed for
XXX XXX XXXX - Brake Fluid Reservoir - NOTE: The brake fluid reservoirs ON ALL W124 and W201 cars have a nipple on the side of the reservoir. Simply cut off the edge of that nipple and attach your hose to the master cylinder to this nipple.
XXX XXX XXXX - Brake/Clutch Pedal Assembly - NOTE: All W201 and W124 use the same pedals.
NOTE: There are some miscellaneous small parts that are not on the list. This is due to myself not wanting to take the time to find them and write them down. These omitted parts are small clips and attachments that are already used on the attachment parts to the automatic transmission.