Hello, World. 2014 vw passat tdi se, manual trans. Love the car. Not so much now. On a trip, the steering-wheel-air-bag warning light, the SRS warning light, the ABS warning light, the (second) airbag warning light, and the low tire pressure warning light all came on. Looks like a christmas tree. Bought the RossTech vag-com to read the codes...lots of errors pretty much corresponding to the warning lights. I don't believe all those faults could crop up simultaneously, but rather expect something in common to be causing it. Did some searches, found folks with wet ECU in older passats. ECU in 2014 is between the battery and fuse box, has its' own umbrella, and was completely dry. Some more searches, found folks with bad ground issues. Traced the ground from the battery to the firewall, found an acorn nut painted body-color-silver with the edges of the nut rounded as if by an idiot with a crescent wrench. I'm certainly qualified to do this maneuver but didn't. Took nut off, added conductive grease to the cable and nut, reassembled. Reset DTC codes, warning lights went off for an hour drive with two stops, came back on after car sat for an hour. I'm guessing perhaps the battery is getting old (3 years, just barely out of warrenty)? Bad voltage regulator? More grounding issues? I could trace and debug each and every warning, but what are the chances they all pop up simultaneously? Any suggestions will be appreciated.