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This is especially for the newer users here, but is also a reminder for the older users here; now is the time to start thinking about cleaning out the leaves that inevitably work their way into your engine bay.
The area I am talking about is specifically under the battery tray and the master cylinder. Under these two areas, there are two grommets that allow water to drain out of that area. If leaves clog the drain, water backs up and sits in there.
If enough water collects there, it will flow into the passenger compartment and will flood out your Transmission Control Unit (TCU) (for Tiptronic owners) and the Comfort and Convenience Module (CCM) (on all cars).
The area I am talking about is specifically under the battery tray and the master cylinder. Under these two areas, there are two grommets that allow water to drain out of that area. If leaves clog the drain, water backs up and sits in there.
If enough water collects there, it will flow into the passenger compartment and will flood out your Transmission Control Unit (TCU) (for Tiptronic owners) and the Comfort and Convenience Module (CCM) (on all cars).