Score for Custom Job Description:
1. Job Title: 10/10, 10/10, 10/10
2. Introduction/Overview: 8/10, 7/10, 8/10
3. Roles & Responsibilities (or Job responsibilities): 9/10, 9/10, 9/10
4. Years of Experience: 10/10, 10/10, 10/10
5. Education Qualification: 10/10, 10/10, 10/10
6. Skills/Knowledge: 9/10, 9/10, 9/10
7. Domain/Industry: 10/10, 10/10, 10/10
8. Key Competencies: 8/10, 8/10, 8/10
9. Employment Type: 10/10, 10/10, 10/10
10. Company Overview: 0/10, 0/10, 0/10
11. Benefits & Opportunities: 0/10, 0/10, 0/10
12. Location & Travel: 10/10, 10/10, 10/10

Explanation of Scores:

1. Job Title:
The job title is clear, complete, and relevant to the industry standard.

2. Introduction/Overview:
The introduction is clear but lacks some details about the company, such as its mission or core values, which are typically found in a benchmark job description.

3. Roles & Responsibilities:
The roles and responsibilities are clearly defined, comprehensive, and relevant to the benchmark job description.

4. Years of Experience:
The years of experience required are clearly stated and align with the benchmark.

5. Education Qualification:
The education qualifications are clearly stated and align with the benchmark.

6. Skills/Knowledge:
The skills and knowledge required are clearly listed and relevant, though they could be slightly more comprehensive in comparison to the benchmark.

7. Domain/Industry:
The domain is clearly stated and relevant, with a specific focus on the automotive industry.

8. Key Competencies:
Key competencies are implied within the roles and skills but could be more explicitly stated as in the benchmark.

9. Employment Type:
The employment type is clearly stated, complete, and relevant.

10. Company Overview:
No details about the company are provided, hence the score of 0.

11. Benefits & Opportunities:
No details about benefits and opportunities are provided, hence the score of 0.

12. Location & Travel:
The location and travel requirements are clearly stated, complete, and relevant.

The custom job description generally aligns well with the benchmark but lacks details in the company overview and benefits & opportunities sections. The scores reflect a rigorous assessment based on the provided definitions of clarity, completeness, and relevancy.