Focus on the ACEA specification. Somewhere around the engine area or at the driver's door may be a sticker with the ACEA specification. Alternatively confirm with the owner's manual or just enter your number plate on the parts web sites. Once you have the ACEA specification, just buy any of these oils and it will be fine.
The numberW is about the oil performance in cold weather. Your biggest concern should be the ACEA specification though. For the second generation cars, the specification is clear and the oils on the market only come in 5w30 form. There is a good chance that this happens for your car as well.