My first thought is low tire pressure. Next time try 34psi cold (should rise to 36psi hot) all around, then adjust from there. The R170 has recirculating ball steering which induces pushing but I found out increasing the tire pressure reduced the push and tire squeal.
Recirculating ball steering has absolutely nothing to do with push (understeer), that is a totally incorrect and misleading comment. Recirculating ball is 'vague' compared to rack and pinion steering, but the geometry doesn't care what the steering box machansim is.
Understeer can be induced by many things, but in general production cars have suspension geometry that is set up that way as for most drivers it's safer than oversteer (loose).
Carrying too much speed on the way into the corner is a good way to overload the front contact patch. Entering the corner off-throttle and squeezing the loud pedal from the apex usually works well.
My preference is for a car that has neutral handling. My/our stock 200 (R171) has a little understeer on slow speed turn-in, but at high speed it tends towards neutral.
Tyre pressures are important as is general condition of the suspension components. Sport pack (stiffened and lowered) helps with bidy dynamics.
Also if you have 16" rims with tall side walls (like me) then some of what you're experiencing is slip-angle. This is effectively distortion or twist in the sidewalls of the tyre. Going to 17" helps. I think 18" or 19" rims result in tyres that are too stiff and unpredictable. In other words they hang on, but let go with less warning.
Good luck, enjoy your 230..
Darn... another necro bump...