Hello Chris,
No problems at all about asking additional questions. The asking bit is simple - it’s the answers are more complex!
3/7/18 servicing work? Brake fluid and toothed belt (the all important cambelt) change, ticked but not stamped. Can we take it you just have a tick in the box but not an invoice? Have you got any information to point to who ticked the boxes/did the work? If not, realistically it should be treated as dubious. OK, the brake fluid not the end of the world for the moment, but an overdue belt renewal might be. Sorry to pass potentially bad news, but.... Just let the form know if you need more info. on this. It would be worth checking the service book for an earlier (stamped) toothed belt change.
‘How do I know which parts I need?). Do you have an invoice for the last (Halfords) service? If not, but the book is stamped, what have they ticked as being renewed? Possibly just engine oil and filter? If this were mine, and I intended to keep it long term, I would be renewing oil filter, air filter, pollen(cabin) filter, and fuel filter. You will then have a good base point to move forward from - sorry, I think I have already said that.
If you are from the school of ‘a service is a service’ and you are happy about that, then you could just accept what is done/not done and be happy with a stamp in the book. If you want to ensure the car is best looked after mechanically, then you ask exactly what is going to be done for your money - in relation to the filters etc. already mentioned.
Quality of parts used? In terms of filters, I would only use main dealer ones (at discount) or Mann or Bosch as alternatives (nothing else). There are some pretty poor quality ones about!
You are now left with being able to ask sufficient questions of whoever is going to do the work - and personally a trusted local garage who you can have a conversation with sounds a good bet.
You can now decide whether you are going to have the brake fluid changed, and more importantly do the background homework on the ‘toothed belt’ done or not done saga.
Hope some of this helps Chris.
Kind regards,
Gareth.
p.s. Haldex and oil? Is yours a Quattro? If not nothing to worry about.
Engine oil brands? I use Quantum (by Castrol?) This is/was the VAG group recommended brand. Available on EBay.