The Liqui Moly Maintenance Service Kit - 136903 is a comprehensive set of products designed to provide essential maintenance for a car. This kit includes six different items, each with a specific purpose in keeping a car running smoothly. The first product is a fuel system cleaner, which helps to remove deposits and improve the overall performance of the engine. The second item is an engine oil additive, which helps to protect and lubricate the engine for optimal functioning. The third product is a cooling system cleaner, which removes contaminants and improves the efficiency of the cooling system. The fourth item is a transmission fluid additive, which helps to maintain the quality of the transmission fluid and prevent wear and tear. The fifth product is a power steering fluid additive, which helps to improve the steering performance and extend the life of the power steering system. Lastly, the kit includes a high-performance engine oil, which is specifically formulated to meet the needs of modern engines and provide superior protection. This kit is a convenient and cost-effective way to maintain a car and ensure it is running at its best.