I just finished going through my parts bin and found this screw that I think might be the one I'm looking for. The one for the center vent. Can anyone confirm this:

HEX Head
Also I found a light bulb that might be for the vent:

It says 12v 0.4w on the bulb. Is this the kind of bulb that should be used for the vent?
I just found this list from Sylvania and found everything but the one bulb I need:
1989 MERCEDES-BENZ 300 E, 300 CE
High & low beam headlamp
9004
9004ST Silverstar High Performance Lighting: the whitest and brightest Halogen
9004XV XtraVision Halogen Upgrade: Up to 20% Brighter
9004CB Cool Blue Halogen Upgrade: White Hot; Super Cool; 100% Street Legal
9004LL Long Life Halogen Upgrade: Lasts two and a half times longer
Parking light
7528
Front turn signal
7528
Rear turn signal
7506
7506LL Long Life Upgrade: Up to twice the life of the standard lamp
Tail light
5008
Stop light
7506
7506LL Long Life Upgrade: Up to twice the life of the standard lamp
High mount stop light
7506
7506LL Long Life Upgrade: Up to twice the life of the standard lamp
Fog/Driving light
H3-55W
H3ST Silverstar High Performance Lighting: the whitest and brightest Halogen
License plate
6418
Back up light
7506
7506LL Long Life Upgrade: Up to twice the life of the standard lamp
Front sidemarker
7528
Rear sidemarker
5008
Glove box
6418
Map light
6418
Dome light
6411
Trunk/Cargo area
6411
Hi-beam indicator
2721
Seat belt indicator
2721
Brake warning
2721
Automatic transmission indicator
2721
Directional signal indicator
2721
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