I bought my car with 15" bottlecaps, tire size 185/65.

A while ago I bought a set of snowtires mounted on 14" bundts from a girl with a w123 wagon, size 195/65.

My wheels came with a motley crew of lug bolts, different lengths and styles. I remembered reading that bundts used longer bolts, so I didn't expect to have a problem if the current lugs were working with the bottlecaps. WRONG. Lugs on the rear wheels were too long, and I probably messed up my emergency breaks. I'm buried in snow and haven't found out what kind of damage I did.

So, from what car did my bottle caps come off of, and what spec lug should I have for these two sets?

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1984 300CD