MSRP is not a factor. Remember the “S” in MSRP means “suggested”.
So if you were buying the car, the sale price is usually below the MSRP.

Check out the real world Mercedes prices out here for comparison.

Lease payment is based off the Cap value (sale price).
The dealer can make a commission on your financing.
Each leasor may set differnent Cap values, interest rate (”money factor rate” ), residual values, and fees.
Other features could vary, ie miles allowed, cost per mile overage, other fees, etc.
Also the sales tax may also vary by county.