You can join parameter table as many times as you have parameters to sort on, with parameter id's as join conditions, so you get a simple rowset with values as columns for sorting.
SELECT entry.id as entry_id,
v_brand.value as brand,
v_year.value as year
FROM entity
JOIN entry
ON entity.id = entry.entity_id
JOIN value v_brand
ON v_brand.parameter_id = 1
AND v_brand.entry_id = entry.id
JOIN value v_year
ON v_year.parameter_id = 2
AND v_year.entry_id = entry.id
WHERE entity.name = 'Car'
ORDER BY year DESC, brand ASC