2018 Mercedes MB C300 lease help

I am new here. Been browsing for long time. Is under $390 per month (10000/36), zero down a good deal on 18 MB c300? Here is attached workup sheet. Any suggestions on how to make it better? Thanks

yes, use multiple security deposits

Predelivery service charge of 995? WTH is that?

I am in Tampa bay Florida area. Not sure what that fee is though seems all my quotes have it.

In regards to multiple deposits, how much does that usually knock off monthly payment? Thank you all