Friend of mine is selling his 2015 Beetle to me. Mileage is very low around 40k only. All services were done on time.
Last month he encountered some problem with the left side mirror, dont know what the issue was but probably something wrong with its motor. So he sent his car to VW Balakong. Checked but the SC said nothing is wrong so he just drove away.

Now, that was when more issues started to come.

During his drive back from the VW he noticed ESP light came out. He went back to VW but they cannot check straight away but gave him an appointment date which is in March instead!

After several days, check engine light came out. In this past few days, EPC light came out, ABS light, Steering light.

1. Will VW SC know if I go and check the fault code outside workshop? Will it void the warranty?
2. Is there such a thing as false warning light? Because according to him when he went to check the side mirror at VW, they plugged in OBD2 so probably the entire system went cuckoo for some reason? Idk, just thinking of possibilities.

Appreciate all your opinions. Thanks