1998 E320 w/ only 1 Electronic KEY - Need Another

[mossimmo]

Greetings,

I just purchased a preowned E320 w/ 110K on the clock. Great Car.

But the only problem is that the car only came with 1 key, the dealer wants to charge me $175 for a new electronic key.

Is it possible to purchase an old key from another MBZ E320 and use it on this E320, if so, how do you reprogram it?

Thanks for your help!!!