The Liqui Moly Maintenance Service Kit - 136726 is a comprehensive kit designed to provide essential maintenance for a car. It includes a variety of products that are necessary for keeping a car running smoothly and efficiently. The kit contains seven items, which are:

1. Engine oil - This is a vital component for keeping the engine lubricated and preventing wear and tear. It helps to maintain the performance and longevity of the engine.

2. Fuel system cleaner - This product helps to remove any deposits or buildup in the fuel system, ensuring that the engine receives clean fuel and operates at its best.

3. Air filter cleaner - The air filter is responsible for keeping dirt and debris out of the engine. This cleaner helps to remove any buildup and ensure that the air filter is functioning properly.

4. Engine flush - Over time, contaminants can build up in the engine, affecting its performance. The engine flush helps to remove these impurities and keep the engine running smoothly.

5. Radiator cleaner - The radiator is an essential part of the car's cooling system. This cleaner helps to remove any buildup or debris from the radiator, ensuring that it can effectively cool the engine.

6. Engine protector - This product helps to protect the engine from wear and tear, extending its lifespan and improving its performance.

7. Fuel additive - The fuel additive helps to improve the quality of fuel, ensuring better combustion and reducing emissions.

Overall, the Liqui Moly Maintenance Service Kit - 136726 is a complete package that provides all the necessary products for maintaining a car's engine, fuel system, and cooling system. It is a convenient and cost-effective solution for keeping a car in top condition.