The principles of the construction and functioning of: internal combustion engines, fluids (e.g. engine oil, coolant, washer fluid), the fuel system, the electrical system, the ignition system, the transmission system (clutch, gearbox, etc.);
Lubrication and antifreeze protection;
The principles of the construction, the fitting, correct use and care of tyres;
The principles of the types, operation, main parts, connection, use and day-to-day maintenance of brake fittings and speed governors, and use of anti-lock brakes;
The principles of the types, operation, main parts, connection, use and day-to-day maintenance of coupling systems (categories CE, DE only);
Methods of locating causes of breakdowns;
Preventive maintenance of vehicles and necessary running repairs;
The driver's responsibility in respect of the receipt, carriage and delivery of goods in accordance with the agreed conditions (categories C, CE only).