I wonder what they charged you for that key head? (called Key Master, see below)
Last time I had a quote the dealer was charging waaaay a lot for it, $13 or something! A few years back they were $3
The problem with the rubber head on early MB keys is that when you turn the key using the rubber part it tears. I have to remind myself constantly to apply torque to the inner part of the key, you know the way you position your thumb and forefinger when twisting it so it won't bend.
The thing is pretty bad from a design standpoint. I suppose its a safety item, in case you hit it in an accident, but its recessed enough that shouldn't happen. Later keys have a molded rubber that is hard and won't bend and break off eventually.
DCM said:
"Thought I would have to throw away the key but my mechanic had a repair kit for it.
Small plastic envelope from MB with a clever repair kit inside. Works well."