Query Strings from Results Page through to Listing Page

Good morning,

I am working on a project for a Garage Services company. They have multiple garages around the United Kingdom, and each garage offers a range of different car services.

Within the main navigation, there will be the following:
MOT | Air Conditioning | Car Servicing | Car Repairs

When you click onto any of those, it will take you to the ‘Find a Garage’ page.
The client wants it so that if you navigate to the ‘Find a Garage’ page from the ‘MOT’ link for example, the search filter ‘Services’ already has ‘MOT’ checked.
Additionally, once into a single Garage listing page, they have an enquiry form, and within this there is a section ‘Enquiry Type’, which lists the 4 service types above… they want MOT to be already checked again.

I assume this is done with Query Strings, but I have no experience of this – does anyone have any other suggestions of how I can tie all of this together?

Thanks in advance.