I'm looking for some advice. I am looking into refreshing the suspension on my 107000 mile A4 1.8Tqs saloon and have come across a low mileage set of front and rear springs/shocks from an S4 avant. I've done some searches online and I think the rear springs & shocks will be okay. I understand that the front springs will be unsuitable due to them being rated for a heavier front end. What issues would I have if I fitted the S4 shocks in conjunction with standard A4 quattro sport springs?