HELP PLEASE OBD C5

[Tiagovp]

Hello everybody. I need help if possible. I want to buy an OBD reader system for my citroen C5 tourer 1.6 110cv 2009 but I don't know which system is the best. I've read a lot of information, software versions, lexia, diagbox...etc. There are different prices on the internet. Aliexpress, ebay.... there are so many that I don't know which one will be the best choice. I would appreciate your help please.
Thanks

[GiveMeABreak]

You need a full chip revision 'C' unit to be compatible with full CAN cars or they won't be able to read some ECUs. As a rule of thumb, the cheaper they are the more likely they are not to be full chip kits that are missing the Optocouplers and resistors with cheaper chips.

For your C5 X7 stick to Diagbox V7 and upgrade it to about 7.62 and no further and this should do everything you need.

[Tiagovp]

Thanks for your help Mark.