Does anyone know where the Fuel Pump Control Module for a 2012 C300 is?

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About a month ago, my sister complained to me that her passenger windows and passenger side windshield would fog up every morning. We got a lot of rain last week and her car shut off on the highway. She pulled over towed the car to my mechanic. He claimed the sunroof drain was clogged, which caused water to back up into the top of the headliner, into the passenger side pillar down under the carpet. He said I could clear out the drain with a compressor but the passenger side of the carpet is wet and it will take some time to clean.

To make a long story short, I picked up the vehicle, check engine light on, passenger side carpet was soaked. Next morning. I disconnected the battery. Took out the passenger seat. Under the carpet there was about 1inch of water. Sucked up the water with a shop-vac. Dried it with a space heater. Put everything back. Cleared Check engine light but the codes keep coming back. Check engine light U0109 & P008B.

It will clear and then come back within a day or so.

I suspect the module has a short. I could also be wrong. If anyone could help thanks! If someone could direct me to where this module is!

 

First of all, Learn how to write in English before you come out all offensive to someone!

With the sunroof closed, water can still sip through the seal. Then the water goes into two sunroof drains one on each side. If you open the sunroof you will see there are 2 drains!

It was clogged!! So the water started running into the pillar onto the floorboard!

Would you like pictures?

Also I did not say relay, I said module.

If anyone else could chime in and help me, thanks!

 

I never mentioned anything about a relay.