Covered areas in German car, moving south east (7)

'covered areas' is the definition.
The answer and definition can be both man-made objects as well as being plural nouns.
Maybe they are linked in a way I don't understand?

'german car moving south east' is the wordplay.
I cannot quite understand how this works, but
'south' could be 's' (abbreviation) and 's' is located in the answer.
'east' could be 'e' (abbreviation) and 'e' is located in the answer.
The remaining letters 'porch' is a valid word which might be clued in a way I don't see.
This may be the basis of the clue (or it may be nonsense).

'in' acts as a link.

Can you help me to learn more?