Welcome to the path of engineering.
Mechanical engineering or automotive or even general term of engineering, require less knowledge of chemistry.
Most of it is physics for mechanical engineering and don't forget math is important.
It's all about problem solving and design & calculation. I name few so you can google it, like using AutoCad, Ansys, solidworks.

There are a lot of career related to cars, such as tyres making, cars assembly. sub-con on car parts, safety etc.

Please google "Finite Element Analysis". Maybe you will be interested in it.

Anything wrong with mechanic and foreman?

For example? Do you mean Exponential & Logarithms?

During your SPM Add Math last time, do you think you able to manage it?
Math can be improved by practice. "Perfect practice makes perfect."
For engineering degree, it's not only depends on math but understanding as well on theories and logics.
More on physics & logics too as you know.
By early preparation and hard work, you can manage with engineering until you grad.

So, your question, I don't think I can answer for you, that you suitable or not for engineering.
If you have interest in it and passion, then answer is yes.
If not, please don't choose it because in the future you will regret.

What's make you want to learn engineering? Can you answer this simple question.

In current era, there are a lot of software to help you do math calculation.
What you learn in engineering is to understand those math theories and apply it using software.
Somehow it's important to know how to calculate by manual. 

Similarly, you will learn engineering drawing by hands and software like autoCAD.
Everything need to learn from foundation, once your foundation is strong, everything will make sense in the future.


You can overcome every hardship throw to you if you have interest in the car.
For your reference.


I tell you my story for motivation purposes, during form 4, every exam, I failed my add math.
I did not take any tuition in my study life.
My physics and modern are considered top 3 in class altho my add math always fail.
My friends really pity me, ask me go for tuition.
But at the end, I study and practise and borrow friends tuition problems and do it.
At my form 4 final exam, I get A for my add math.
That's all

If you have any problem with the math, you can always find Critical_Fallacy sifu in Ask a Mathematical Physicist thread.

Last time fail that time is around 34marks, I think is F... Then jump to 1A.
Practise more then will be ok. A lot of miracles in the world.

Indeed it was epic.
I fail a lot of time before too, experienced a lot of time so learn a lot.
"Smooth seas don't produce skillful sailors."
He was very humble in asking questions too in the forum.
Common academic result yet attitude and manners are there

Not like yesterday Straight-A's student, where I do not see manners from that young guy.
Last few day another called k***ming, today want to become lyrics composer, doing survey in /k.