and thanks me to help you today. I am a licensed diagnostic and repair technician, I look forward to working with you.The Citroen C5 is a very comfortable and reliable car, as with all modern diesel engines it is important to ensure it has a good service history including regular oil changes. age and millage of the car it is priced well and I think based on what you say it is a better option over the Astra. Citroen have a history of making very good diesel engines and you would find it difficult to find a car like this which is as comfortable and well spec'd money without going down the VW/Audi route, but you would have to compromise spec or budget to get something like the c5.If you were to consider looking at other cars of a similar size I would recommend you look at the following. Audi A4, VW Passat, Ford Mondeo, Vauxhall Vectra, Peugeot 407, Renault laguna.The Peugeot 407 is effectively the same car, and the Renault will offer very similar comfort levels but the Mondeo and Passat would be worth looking at but I think getting one same price with low millage may be a struggle, The Vectra i find is more comfortable than the Vectra but doesn't come close to the C5. and there is very little difference in reliability with these modern diesel engines.I hope I’ve provided the information you were seeking. If you need more help, please use the reply tab to continue our conversation. If you do not require further assistance, kindly rate my service. Thank you, Ross.