German cars > French cars.
Better designed and engineered. French cars are notorious for being poorly laid out for maintenance etc. Their car industry only survives because its largely owned by the French Government. (Dont get me wrong, we British also traditionally made shit cars).
Most modern cars are pretty reliable, (if maintained), regardless of marque. DP is being practical, German or Japanese is always a safe bet. Take heed of what former owners say above.
But, ultimately, If you are paying for it, your choice.
Tbh, If I was going to buy a car at 10+ years old, I would probably gravitate to something like a Toyota, which are nearly indestructible (remember the famous Top Gear Episode where they tried and failed to kill a Toyota Hilux).
For similar money, you could get a Japanese grey-import Toyota Alphard - these can have the same number of seats and still fits in a standard parking space. It would be a bit older than the Renault, but a much safer bet in terms of its reliability.
Although they are grey-imports (ie non official imports) the parts are common with other models and so cheap / easy to source.