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There is not a reset for the break wear indicator light on the Mercedes-Benz GL450. You will need to fix the problem before the light will go off.
You should add coolant with the engine off and cool, top off the radiator and fill the coolant reservoir to the cool or cold level. When the system is hot or running it will be pressurized and will be dangerous to open. You can however add coolant to the overflow reservoir at any time.
Off and cooled down. Putting cold coolant into a hot block can crack it. And it can damage the radiator, as well as spitting the coolant back at you.
Add coolant to the reservoir. If the low coolant light still stays on, replace the low coolant sensor.
usually when you add coolant light goes off Coolant sensor bad?
Check the bottom of the radiator for damage. The coolant light will go on when the fluid level drops too low. Check the reservoir and add as necessary.
The coolant light should be going out when the system is filled. The sensor itself or the float system is probably bad.
Add the coolant into the coolant reservoir. Be sure the engine is cool when you remove the cap off the reservoir.
Coolant system warning light. It should go off when you add coolant.
After your car has completely warmed up the coolant level should be at the hot line. If it lower than that , wait until the car cools off and add coolant until it reaches the cold line. Never add the coolant directly to the radiator as you may over fill it.
The don't add anything in particular, they Zamboni it to smooth it off, but they have coolant pipes underneath the ice to keep it frozen
You would add coolant (not water) to the vehicle's reservoir when it is off and cooled down. Fill it to the cold line.