Is there anything available for this model to enhance performance? Simple things like airflow, chips and such?

There is am ECU tune and some exhaust stuff, however the airflow intake MB designed is already top notch.
The modifications I listed are not going to turn the car into a beast. Possibly 20-30 hp gains.

Depending on how much power you are going for and the budget.....in many cases it can be easier on the wallet
and the reliability to consider stepping into a a higher performance model.