Should I study Computer Science or Mechanical Engineering?

I have always loved technology and how it works, I have a huge addiction to technology. I also love machines and construction. My only problem is that I'm not to good in math. I am like average or a little below average in some areas. That's my only problem.

I really don't know which to study. If there's a major or field of study that involves both. I'll be happy to study it. Double majoring is not an option by the way.

Look into the courses and pick then, it is your career afterall; so putting such a question on here is naive; try asking lecturers or others for insight. Im currently studying mechanical engineering at UCL, and it is very difficult; your maths has to be good, practise if you want to choose this route. Here are a few topics i do and you can get an insight on whats needed for mechanical engineering

Applied Electricity
Applied Mechanics
Fluid Dynamics
Thermodynamics
Dynamics And Control
Modelling And Analysis
Computing
Management
Accountancy
Design Engineering
Stress Analysis
Micro And Macro Material Studies