The ideal coolant level should be between the F (full) and the L (low) marks or between the MIN and MAX marks on the coolant reservoir side. Below or above this level, the car might run into problems; thus, you should ensure the coolant is within this level during the winter and any other season. If you don’t have the right coolant, your car Step-by-Step Guide to Check Your VW Golf’s Coolant Levels. Step 1: Park your car on a level surface and let the engine cool completely. Step 2: Locate the coolant reservoir tank and check the fluid levels. Step 3: If the coolant levels are low, add the appropriate coolant and water mixture. Leaking coolant: A leak in the cooling system can cause the coolant level to drop too low. Check for leaks around the radiator hoses, water pump, and engine block. Overheated engine: An overheated engine can cause the coolant to boil and evaporate. This will cause the coolant level to drop and trigger the warning light. Step 3. Look for the level markings of the coolant reservoir. Often it will have Low and Full or sometimes Min or Max labels. This is usually located at the side and will dictate the current status of your coolant. If the coolant is showing to be in the Full or Max mark, then your car has enough coolant. DIY - How to check the coolant level on a Generation 2 Toyota Prius.You can now Buy Me a Coffee: The “Mercedes-Benz Check Coolant Level” warning light is an indicator on the vehicle’s dashboard that appears when the coolant level in the engine is low. It is important to address this warning as soon as possible, as a low coolant level can lead to engine damage if not addressed. If you see this warning light, you should stop the Here’s a quick way to check it. Begin with a cold engine. Remove the radiator cap and start the engine. Set your digital multimeter to DC volts at 20 volts or less. When the engine reaches operating temperature, insert the positive probe directly into the coolant. Rev the engine to 2,000 rpm and place the negative probe on the negative bF0R.