What Car? Q&A - Introduction

In our postbag this week, readers' ask advice on four-wheel-drive cars, Lead Replacement Petrol and MoTs on imported cars.

Click here to submit a question to the Q&A team. We publish a selection of your questions – along with What Car?'s answers – here every week.

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.