2. As used in this article the term "motor vehicle repair shop" means any person who, for compensation, is wholly or partially engaged in the business of repairing or diagnosing motor vehicle malfunctions or repairing motor vehicle bodies, fenders or other components damaged by accident or otherwise, except that such term does not include:

1. (a) an employee of a motor vehicle repair shop who engages in the business of repairing motor vehicles solely by reason of his employment;
2. (b) any person who is solely engaged in the business of repairing the motor vehicles of a single commercial or industrial establishment, or of the federal, state or a local government or any agency thereof; or
3. (c) any person whose activities consist solely of fueling, changing oil, water, batteries or tires, replacing fan belts, air filters or oil filters, installing windshield wiper blades or light bulbs, or such other minor repair and servicing functions as the commissioner shall by rule prescribe; or
4. (d) any person solely engaged in the business of repairing farm or road building machines, or such other utility vehicles as the commissioner may by regulation designate. The term "motor vehicle repair shop" shall also include any shop, drive-in station, or garage operated by any person, firm, corporation or association at which motor vehicles are inspected for the purposes of appraising, evaluating or estimating the extent or value of motor vehicle damage or the necessity or cost of motor vehicle repairs.