Is this deal good enough? Please help!

Hello folks, this is the first time I will be leasing a car since I just graduated from a med school. Here are the details:

2018 Loaner MB C-300 Coupe----------------- $570 per month including tax, 12k miles per year and 36 months with ZERO DOWN but MSD is $5000k
MSRP: 50K
Loaner discount: $6700
Rebate: $2000
Price after discount: $41250
MSD: $5000
Taxable fee, tax, pre-delivery service, registration, other fee: $43600 (Net price)

I am also getting a brand new 2018 BMW 230i Coupe $540 per month including tax, 10 k miles and 36 months lease (39 k MSRP) for $ 1500 down (dealer fee and registration etc)

I would love to have a convertible with AWD feature but a Coupe with reasonable lease will also work. I am finding it incredibly challenging to get a lease under $500 for even a loaner vehicle forget about new vehicles. I would really appreciate your input. Thanks in advance!

Bad deals based on deals posted here.

Not good deals. A loaner 2018 C300!? They just released a few weeks ago. That doesn’t seem right.
Also on a loaner C300 you wanna see at MINIMUM 20% off MSRP.