Search the maintenance guides for answers to 99.999% of Omega questions
Take a look at this link, it has the Omega brochure in pdf format. That's the best resource for comparing models with all the technical details.
https://www.gmproductforum.co.uk/category.aspx?mid=2&sid=2&pid=11&cid=310
Welcome to the OOF.Thanks I havent bought one yet but as soon as I do I'll fill it in.
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a few other things to check
Pull out a spark plug lead on each side and check there is no oil in the spark plug well. If there is it will need new cam cover gaskets, bit of a tricky job (but there is a guide on here), expensive if you ask a garage to do it
Check that the EML light comes on the goes out when the ignition is switched on. It has been known for the bulb to be removed.
If its a 2.5 or 3.0 v6 take a paperclip and do the test (see guide on here for how to). This will show you any fault codes store in the ECU. For the 2.6 or 3.2 I think there is a similar thing you can do using the brake pedal (not sure I have a 3.0 and keep a paperclip handy)
Check that the coolant is red not blue and that the header tank doesnt have any oil in it. If it does it means a replacement oil cooler and thats quite a few £££.
Uneven wear on the front tyres (usually a strip about 2 inches wide worn bare on the inside) indicates geometry problem. Can be fixed for £60 at WIM plus new tyres around £80 each inc fitting
take it for a drive, check for juddering under braking. This may be knackered discs but could also be wishbone bushes. Not expensive.
test everything. Elite has heated mem seats, check full range of adjustment. Check rear view mirror motors work etc. Check aircon on all settings.
Totally agree about the cambelt check. I had an immaculate 2.5 V6 CDX with only 65K on the clock. Was going to get cambelt changed at next service, unfortunately it went before the service was actually due. Last changed 4 years 1 month ago! Gutted!
Hello and a very warm welcome to you!
For a good response to your questions about a future Omega purchase post them under the Omega General Help section
" now I'm ready to buy my own 
, but dont want to make a mistake, I would like petrol, lots of extras, leather or a dark interior, and cheapish is that too much to ask?I have a few questions If these have been answered before please could you point me to the link "I have been Googling " what is the best engine to go for, what is the face lift model and what year did it come in"edit found out that one". if any members here had up to £1800 to buy one what would there model of choice be? is there any mechanical things that are a common problem to watch out for?
