Extra power on c200K 2001?

[cookci]

I know i can fit a larger crank pulley to gain a few BHP but is there anything else i can do? IIRC i think the car is 163bhp standard and im starting to wish id bought a car closer to the 200bhp mark.

I intend to change the oil and air filter which might help the car make sure the car is running at least the standard BHP and double check the wheels spin freely etc.

-Is it worth modifying the intake? Also getting a greens panel filter?
-do they have a throttle heater that can perhaps be bypassed?

any suggestions other than buy a faster car would be appreciated haha

Thanks

Also a few pictures of my car