Hi Gary. My personal advice. Spend a lot of cash now, layback in peace tomorrow. Bad surprises you'll surely encounter:
- check those belt tension wheel. they break suddnely and leave at roadside. TIP: change all them at once, learn how to change a belt, have the wrench and a spare in your trunk. soon or later you'll need :-/
- run (mean, go with care) to the mechanic and ask him to take off both front wheel hubs and check the bearings. There are some support screws too that may become loose, make noise and risk your life.
- check radiator lid if it's ok, else buy a new one. I used a cheaper ascona/monza, as the original omega costs 20x more (judge yourself what to do and ask an expert if in doubt)
- check fan relay (temperature) and fuse. If the fuse goes or the sensor fails, more roadside and lots of steam... :

- check (test) fuel pump and its relay. Don't wait until you stop at roadside to remember (i did it...). (applies to petrol. dont know diesel)
- change all filters, specially fuel (applies to petrol. dont know diesel)
(is there a valve to flush old diesel in your car? if so, use it at least once a month to clean water from fuel... diesel is awful somtimes)
- clean idle sensor, and air intake it gets clogged. seriously. car won't idle and will burn more gas (applies to petrol. dont know diesel)
- clean / check starter motor. it gets clogged, burn its brush,etc, and there you are at roadside again... do it now, not next year
- for lights: check every fuse and relays (sorry haven't the instructions, saying my generic knowledge), clean contacts. check for grounding... some stuff wont work if not well grounded, that is tight your screws well and dont forget hanging wires...

(i do sometimes)
- what's this blower fan? turbo stuff or else? Im ignorant on this... Well, always check eletric wiring if its and fuse.
sorry for being so ignorant. HTH in some way :-/