That could get expensive and you'll have to pay even if they don't find the problem. It sounds like you have eliminated the easiest checks.

If you are concerned about the car not starting in the AM, you could pick up a small charger designed to just cover the loss from the drain. Sometimes called a battery tender or maintainer. They are pretty inexpensive. I think I paid $8 at Harbor Freight.

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Good luck.






1998 E320 Wagon