Monday driving home from work in Phila to coastal NJ I saw 100F outside temp. and the sun was blaring. The a/c was struggling a bit but car was cool and comfortable cruising along at 75 mph. Average 41+ mpg for the commute, 213k miles on the car.
IMHO a ScanGauge II is must for these cars, I added mine early on. Water temp, boost, EGT, dpf temps are displayed at all times. I typically take it easy for a mile or two before reaching my destinations and then idle until egts come down and drop below 275F, ~ 1-2 minutes.
Yes it sounds like the headlight switch was changed. Have you checked the tail lights with the car running and the switch in various positions? You may luck out and have a rear fog installed. Mine is similar to the picture and I usually leave it in auto. When in the "on" position I get fog...
If I remember correctly if you pull the drain plug while the car is not running quite a bit of fluid comes out. When dsgs first came out this was a common mistake. The car must be running and at a specified temp to determine the correct level. You should be fine, it was a rookie assigned to...
Try Googling "reset passat tdi heater flaps". By pushing the a/c and middle vent heater buttons simultaneously the system moves the all the flap actuators through their full ranges of motion. Mesaure coolant temps at several locations with an infrared thermometer and verify coolant is flowing...
A simple test of parking brake effectiveness is to stop the car from 20mph exclusively with the parking brake. Just hold the button and pull up gently until you stop. You'll know if they work and how well. Good luck, John
I have never been a fan of testing and switching oils every change being unsure how the additive packages interact if at all. DelVac 1 esp 5w40 for me @ 10k mile intervals, now at 210k miles. Good luck, John
Try to get a copy of the diagnostic scan. My 2014 CKRA had the flashing glow and limp mode, it turned out to be a bad
Air Charge Temperature Sensor. Located on the side of the intercooler and pretty simple fix. Good luck, John
I have downloaded Erwin for several cars using the one day subscription. I am old school and prefer my old Bentleys. One major disappointment is lack of the wiring diagram. I have two short to ground fault codes (fuel temp and coolant fan) and wish I could investigate/trace "on papaer" before...
Bilstein HD shocks and a rear H&R bar. Upgrade your brake pads when the new ones are needed.
I don't worry about acceleration and once up to speed keep it there, corners or not.
If still not fast enough get a tune.
Try the search function maybe with "heater core". I remember a pretty good write-up using a shop vac at the filler cap and removing a small hose for the make-up air. When my time comes that's the route I am taking, although I am a 2014 ckra. Good luck, John