you can get all the information from the Singapore German Embassy over here
1. book your appointment online
click here Singapore Germany Embassy Appointment Schedule System
please do this as soon as possible, especially if you have a tight time frame. this is the only way to get appointment and there is no express visa.
the only way to get an early appointment in German Embassy is by checking the appointment system everyday. once you see a earlier time slot, cancel your current one and book the earlier date.
Another thing that you need to know is that for some nationalities (mention above), it will take at approximately 14 Working days! I had a bad experience about this, I didn't know and end up I need to arrange my travel.
2. Prepare all the document + one copy
here is the checklist to apply German or Schengen Visa in Singapore for Tourist visa
here is the checklist to apply German or Schengen Visa in Singapore for Business visa
any other visa you can see the checklist here (at the bottom of the page)
3. Go early on your appointment day
the address is here: 50 Raffles Place #12-00
Singapore Land Tower Singapore 048623. Telephone : (+65) 6533 6002
you can alight at Raffles MRT Station take exit A or B. if you take exit A after you take the escalator look for the ANZ Bank (blue banner on your right, at 1PM direction) just walk toward the ANZ bank, walk pass it and you'll find the entry to the Singapore Land Tower.
if you take exit B after you come out from the exit turn left and you'll see the blue banner on your left.
you need to get your visitor pass at the receptionist and proceed to the 12th floor.
there will be a guard checking your appointment date and time, and then just sit down until they call your name.
please take a note that on the day you submit your appointment you need to pay the visa fee at the exact amount S$$110.
check the name on your reciept before leaving the counter (they've got my name wrong)
4. On the day of Collection.
collection is from 9am - 11am, no prior appointment needed just go there show your reciept.
do not forget to bring your passport on the day of collection. they will no ticket / and they will not call your name, instead the counter will call "Anyone come for visa collection?" then you go to counter 2 submit your reciept they will tell you to wait and call you back.
hope this guide will help you, especially if you are first time applying German or Schengen Visa in Singapore.
just post a comment if you have any question, but I can only answer from my experience :D