2007 Volkswagen Passat Tdi Variant

2007 VW Passat TDI Have upgraded to a 4wd run about that can tow. In average condition plenty of wear and as you would expect for a car of this age. The pros. Really economical often getting 1250 kms on a tank. 5.5-6 ltr per 100km on average. Cambelt/waterpump replaced at 346km have receipts for this. Good tyres all round. Regularly serviced always correct oil used, my parents owned this before me for 10ish years. Aircon and everything works. Drives absolutely fine plenty of power when you need it and cruises along the highway just fine. The negatives. Side passenger door doesn't open from the outside opens fine from the inside. Engine light up. I have a scan tool and will upload the issue it's a short to #1 glow plug it goes away for a week or so when you reset it. It doesn't affect driving and has been up for a year now. Tried to get the exact code but hit reset so will get the code when I comes back on did 150km round trip today and it didn't come back on. Stereo is a factory model up so doesn't connect via the cambus and can drain the battery if not turned off. It has Bluetooth hands free is why it's used. Still have the old stereo that can be put back in if wanted. The old stereo doesn't drain the battery at all and works fine just no Bluetooth connection. Feel free to ask any questions happy for someone to come view/test-drive.