On the surface this looks like a decent deal, but the net result, a payment of $400 with $2400 DAS, is high. You can see my reference deal here which was at $384 with $384 DAS.
You are getting about 14% off pre-incentive, which is good for a loaner, but you don’t mention any rebates or incentives. It’s pretty easy to qualify for fleet discount with Mercedes, do you not have loyalty or conquest? When I leased my GLA250 loaner I had $2250 in rebates.
You may want to look into stretching this out to 48 months.
You may want to consider putting down MSDs to lower the MF.