My 1982 300CD has not been driven for about 3 years! I had placed the key on the floor mat. When I went to start it yesterday, the key was rusted completely (and crumbled in my hand)! I have never had this happen in 40 years!

I have no other key! My question is if I cut off the black security ring, can I get the tumbler out? I have an extra security ring.

I had thought about getting a replacement key from the dealer, but I am not sure if the tumbler has been replaced.

Any help much appreciated!

Richard G.