No light behind the heating and air conditioning controls

https://www.youtube.com/watch?v=Hbr77jfWwOk

Sunroof drains are a common problem on many models. Cleaning or modifying the sunroof drains usually takes care of the problem. You may resolve your problem. I believe that the trouble codes are unrelated and may need professional diagnosis as you need VAGCOM to adapt the throttle.

The first step is to plug in an OBD-2 scanner to read exactly what the fault code is, that is setting off the check engine light (CEL). If you are in the USA, most auto parts stores like AutoZone, Oreillys, or Advance Auto Parts have these OBD-2 scanners and will check for vehicle fault codes at no cost (free).
Since the problem seems to arise when the check engine light comes on, it is likely the code will show the exact malfunctioning part, or an area to focus on.
Without knowing the exact error/fault code, it's impossible to say what the exact problem is, that's causing the car's shutdown.

GO TO THIS SiTE TO CHECK THE FUSE BOX!
http://vwtech.no-ip.info/images/golf/post90.gif

This are the FUSE and RELAY number SLOT!
Fuse No. Description Ampere Rating 1 Headlight, low beam, left 10 2 Headlight, low beam, right 10 3 Instrument panel lights, license plate lights 10 4 Glove compartment light 15 5 Wiper/washer 15 6 Fresh air blower 16-valve only: Air conditioning 20 7 Taillights, side marker light, right 10 8 Taillights, side marker light, left 0 9 Rear window defogger 20 10 2.0 16-valve only: Fog lights 15 11 Headlight, high beam, left,High beam indicator light 10 12 Headlight, high beam, right 10 13 Horn 16-valve only: Radiator cooling fan 10 14 Back-up lights, washer nozzle heaters 10 15 2.0 16-valve only: Engine electronics, stabilizer valve, cold start valve 10 16 Instrument panel warning lights, 16-valve only: Multi function indicator 15 17 Emergency flasher switch, turn signals 10 18 Fuel pump, oxygen sensor heater 20 19 Radiator cooling fan, air conditioning 30 20 Brake lights, cruise control 10 21 Interior lights, digital clock 16-valve only: Luggage compartment light,multi function indicator, central locking 15 22 Radio, cigarette lighter 10
Relays Relay No. Description 1 Air conditioning 2 Open 3 Digifant control unit 4 Load reduction relay 5 Low coolant level control unit or Open 6 Emergency flashers 7 Rear Wiper 8 Intermittent wipers 9 Seat belt warning system control unit (possibly headlight warning too?) 10 Fog lights 11 Horn 12 Fuel pump (except diesel)Glow plugs (diesel) 13 Radiator cooling fan after run (except 16-valve)2.0 16-valve: Starter interlock relay 14 Automatic trans., coolant temperature indicator,starter interlock relay (except 2.0 16-valve)2.0 16-valve: Radiator cooling fan after run 15 ABS pump relay 16 ABS relay 17 Heated seat control unit, driver 18 Heated seat control unit, passenger, or power seat circuit breaker 19 Automatic transmission 20 Open 21 Power window relay, ABS hydraulic pump fuse 22 ABS valves fuse 23 Air conditioning, power seat fuse 24 Power window fuse

Check operation of the heater coolant on/off control valve and operating mechanism.
Check thermostat is installed and working OK - replace if in doubt.
Check if coolant heater supply hoses are warm/hot when coolant valve on.
If hoses are cold (no coolant flow evident) check coolant system is properly filled (bleed system as necessary to remove possible air locks).
If still no coolant flow check heater system for blockage.
If all above ok, check heater unit air control vanes operation.

This is for a 1.8T engine car...
1 - Heated washer nozzle 5A 2 - Turn signal system 10A 3 - Light for glove compartment, air
conditioning, selector lever 5A 4 - License plate light 5A 5 - Instrument cluster, heated seats, cruise control test plug, air conditioning 10A 6 - Control module comfort system 5A 7 - ABS 10A 8 - Automatic headlight beam
adjusting, telephone system 5A 9 - Heated Mirrors 10 - CD changer unit 10A 11 - Cruise control by automatic transmission 5A 12 - B+(battery positive voltage) for on board diagnostic (OBD) 10A 13 - Brake lights 10A 14 - Comfort system 10A 15 - Instrument cluster, automatic transmission 10A 16 - ABS/ASR 10A 17 - Navigation 10A 18 - Right headlight, high beam 10A 19 - Left headlight, high beam 10A 20 - Right headlight, low beam 15A 21 - Left headlight, low beam 15A 22 - Parklight, right 5A 23 - Parklight, left 5A 24 - Wiper system 25A 25 - Fresh air blower, recirculating control air conditioning 30A 26 - Rear window defogger 30A 27 - Rear window wiper system 15A 28 - Fuel pump (FP) 15A 29 - Engine control 20A 30 - Sunroof 20A 31 - Back-up lights, cruise control, automatic transmission 15A 32 - Engine control 20A 33 - Cigarette lighter 15A 34 - Engine control, injectors 15A 35 - Trailer socket 30A 36 - Fog lights 15A 37 - Radio system, telephone system 20A 38 - Comfort system 15A 39 - Emergency flasher system 15A 40 - Dual horn 25A 41 - ABS 25A 42 - free 25A 43 - free 10A 44 - Heated seats 30A

Has the car been changed coolant since it was bought? If it is time to change, let do a flush through a heater core. There are 2 coolant hoses going thru a fire wall. One for coolant in and one for coolant out. Heater only works if coolant is flowing through the heater core. Therefore, there are one or both following cases contributes to the problem: 1-If the valve control coolant flow gets stuck, then it always closes  so there is no heat. 2-If the valve is working, but the heater core gets clogged up, then there is no heat.

I think u r right. this is a problem that most certainly requires a skilled technician to solve If u dont know of anyone who is good at this problem that leaves only the dealer and of course they are going to sockit to you. get an estimate.. it might be a good idea to check all your fuses first. then look under the hood for any loose vacum lines. dont forget your fuses under the hood usually in a plastic box.

to turn on the fog lights, its the same switch that you use to turn on your head lights. Turn the dial to the right to turn on your head lights and then pull it towards you. thats how you turn your fog lights on

try this link.
VW Passat 2001 indicator light problem Google Search

bad heater core?