Hi,
I have a w204 c300 2010, she hasn't been used in a while and wouldn't start, after I jump started it with a starter pack the abs, power steering and cruise control fault came on, when I scanned for faults nothing came up.
any suggestions?

Thanks

 

Most likely tbats the impact of the various modules being underpowered as I assume your battery went flat. They hate even a small drop in voltage and that can persist after youve jump started it as the battery is still underpowered. You should check your batteries and alternator. Less than 12.6v engine off and less than 13.7v engine on means you have a dying battery and or alternator.

As it had been sitting for sometime all those modules would have been looking for a healthy supply of power. Just because a car starts doesn't mean it's getting enough power and that's where the ABS, ESP, cruise control and other similar modules go haywire. Electric power steering hates a lack of voltage.

Get you battery tested with a proper tester (not just voltage) as well as your alternator. If there's a problem there, its an easy fix and you'll probably see your problems dissapear.