Keys/lock cylinders
 

Hello, I have a new to me 1985 300sd and only got 1 key from the PO. I have searched, but cannot determine if there were 2 separate keys that originally came with the car. I am assuming that since the key I got does not fit the trunk or door lock cylinders that there is an unlock key and an ignition key. Is this correct? if not, it looks like I will need to replace some lock cylinders for all the woes that surround them. If for some chance I just did not get a trunk/door key, is there any way a dealer could cut a key to fit, given the VIN? Also, I have a metal card in the glove box with the original owner's name and some codes. Any chance this would have a key code?
Thanks in advance for any info.

There is only one master key. It unlocks the doors and trunk, glove box and ignition.

The chances are, somebody before you replaced the ignition cylinder with a used one. You can't go to the dealer and get a key for it, they'll send you another "door" key. A new cylinder with a master key should be about $90 from the dealer. Dealers don't really cut keys based on other keys, they cut a shape based on the VIN. A locksmith can duplicate a key, albeit a worn one.

I had a 240D that had this happen in the past. The lock cylinder was starting to go, so it was a no-brainer to have the cylinder replaced. After that point, just one key. :)