[quote=cphilip;1829319]My 83 has similar situation I think. There is a separate key to the door locks than the ignition because at some point a PO had to change the ignition out. So the later Ignition key does not work in the doors... however the older key does and does not work the ignition. Fortunately I have both though.

I ordered key blanks from Keymen.com and just had them cut at the local hardware store. But I had to have them cut both keys. One for ignition and one for doors.

Your problem is that a PO changed your tumblers and didn't get them from the MB dealer. You can order a set of tumblers from your local MB dealer and it will come with a master key - it's done based on your cars serial number and then you'll have one key that works everything.

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Houston, Texas
1984 300CD 235K miles, Elvira, one owner
1987 300TD 180K miles
1974 TR6 78K miles Sarah Jane, one owner
OBK #27