idk786 wrote:the 04 is a gls 3.2 did. didn't check if it had diff lock or traction control. thanks for the advice should i take it for any tests before i buy? i drove it and looks and goes really nice but thats where my knowledge stops

DEKRA does a thourough check. I understand that they are in an alliance of some sort with AA. Their price is reasonable. You can search "DEKRA" on this forum to find members' experience with DEKRA.
Otherwise you need to listen to the engine (you do not want to hear "clacking" noises or pressurised air escaping - listen under the hood), check for any smoke, check the 4x4 technology, feel the gear shifting, check the oil (dark is OK, but check for any milkiness (water), ideally you should (have someone) check the diff- and gearbox oils as well - a brown sludge may indicate rust and water. Look for oil leaks. Look for any indications of radiator leak(s), make sure the cooling system is green (i.e. it is lubricated), and check for rust in the reservoir - indicates poor maintenance and lack of coolant in water. If you are at the coast, look for RUST - especially around windscreen, and under door rubbers (especially rear door - pull the rubber in the bottom corners off the frame and check). Check the under-body for rust, bumps and damage (4x4 abuse).
Normally a well kept car (good, clean and maintained inner) indicates the right attitude to maintenance - and probablly well maintained technically.
Hope this helps!
Happy hunting,
Anton