What Car? Q&A - Introduction

Is driving without screenwash illegal? Why do front wheels get dirtier than rear wheels? And is an old-fashioned chamois leather better than synthetic types for drying your car? These are just some of the questions you've sent to us this week – read on to see more from our busy postbag.

Click here to submit your own question. We publish a selection of your questions – along with our answers – here every week. Please be aware that we are inundated with questions and can't promise to reply to every one.

Don't forget you can also turn to the What Car? Helpdesk with motoring problems or disputes you might be having. Click here to e-mail the Helpdesk.