Mine came on to tell me that the coolant was low. check that. Remember to use the right kind of coolant and don't mix different kinds.
Look in your owners manual or call a VW dealer.
2004 vw beetles have an aluminum engine therefore require the blue colored coolant.
VW will tell you that you must use their specific yellow coolant. You don't. Just use the top of the line Prestone that is for all engine types. Don't add water!! It runs on pure coolant...
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Proprietary Coolant available only from VW repair shops. Never, never use any other type of coolant as it will turn the radiator fluid into jelly and not work. In an emergency, you can add Distilled Water to get to the repair shop. Never, never, never use tap water under any circumstances.
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Coolant is pink. You should have your water pump checked.
Coolant for a 2006 VW Bettle is put into the coolant overflow tank. As it is needed, the radiator will automatically pull in additional coolant.
You can use the two keys to reprogram the car remote of 2000 VW Jetta.
A 2000 VW Cabrio takes power steering fluid as advised directly by VW. It was difficult to put in, I had to use a straw and small funnel, adding a little bit at a time.
Check coolant leaks with a visual inspection. Clean the engine, then see where the coolant reappears. Look under the water pump. Check engine oil to see if coolant is leaking into the oil.