Multi-value parameter with IN statement

Hi. I have a ssrs report with a single selection "Car" parameter. The parameter Label and Values are as follows:

Label   Value
Ford     Ford, Ford Fiesta, Ford Van
Skoda  Skoda, Skoda Sport
Fiat      Fiat Panda, Fiat Sports Wagon

I need to pass through the value csv into an SQL stored procedure. I assume it will get sent through as:

"Ford, Ford Fiesta, Ford Van"

Is there an easy way to split this in SQL to use with an IN statement?

Thanks