VW Tiguan Assistance System Faults

Hello all, after scouring the VW forums I thought I'd post on here in an attempt to help my partner out

She has a 66 plate Tiguan 150bhp SE-L. Completely out of the blue on Christmas Eve when traveling to my parents the following faults appeared 

Lane Keep Assist Unavailable

ACC Unavailable

Front Cornering Fog Lights Unavailable

Front Colillison Warning Unavailable

Traffic Sign Recognitions Unavailable

She pulled over at the service station after speaking to me and cleaned the ACC sensor (VW badge) and the front parking sensors on the front and rear and the underside of the wing mirrors and the sensor array being the rear view mirror.

No luck.....

We then set about turning everything off and turning them back on one by one until the fault presented itself....made no differencee the faults kept appearing. Interesting that the one function you could Renable was the lane Keep Assist , just says "Function Unavailable"

We then noticed after turning off and back on the car that the fault occurs after you go over 35mph. If you set the ACC when at standstill and allow it move the car forward all systems "appear" to be okay until you go over 35mph and it come back on again.

Since then we have checked the cornering fog lights are actually working , which they are 

She had been carrying a heavy loads ( 2 X German Sheps, 1 X daughter lots of Christmas related pressies be and clothes etc etc ) so we took her car "empty" and did the tyre pressures to rule out the fact the back end was weighed down when may have caused the sensor to loose it forward sight... apparently it's a fail safe when towing things such as caravans.

This morning it's happened again .

We are going have it booked in to be looked at by a VAG specialist we use. We are assuming it'll be 

À, Sensor throwing a fault .......(best case)

B, Requires an attempt at re-calibration (not known to be reliable as most people report it cures it only for a short while)

Ç, Replace the ACC sensor then it'll require a further recalibration.   Or 

D, All of the above fail.......and they scratch their heads 

All of the above are not going be cheap and the car is unfortunately out of warranty...

Since it's basically the same system as what Skoda use i thought it was worth asking the question 

The car does have a Virtual cockpit, the car doesn't have Blind Spot Monitoring

All very odd and we are definitely worried it will be well over a ££££ figure fix.......

Many thanks