Date registered: Mar 2005
Vehicle: '01-E320 & 02-ST2
Location: John 15:18-19
Mentioned: 0 Post(s)
Quoted: 35 Post(s)
The only source for replacement keys (and that's what you want, since it will disable the current ones you lost, rather than additional keys, which would leave the old ones active) is the dealer.
And dealers charge however much they like, and some like it more than others. So call around to every dealer in traveling distance (you have to go twice, once with ownership documents and ID so you can order the keys and then again to pick them up) and get a turnkey (no pun intended) quote. There is likely an additional charge to disable the original keys.
I don't know how you "lost" four keys, but it may be that you have some insurance policy (homeowners sometimes does) that may cover part or all of the loss.
Socialism is a philosophy of failure, the creed of ignorance, and the gospel of envy; its inherent virtue is the equal sharing of misery. (Winston Churchill)