depende kung gano kahaba and kalalim yung lulusungin mo. in your case, 5 meters nga lang pero hanggang tuhod naman, which means, entire wheel mo lubog. in your given case too, mas maganda nang pababain yung tubig muna o if you can't help it, patayin mo na lang yung engine at itulak.

kung medyo mababa naman yung tubig, let's say kalahati ng gulong. should go through the water slowly, on first gear and on high rev. dapat patay aircon.

sa makina, kung mababaw lang naman tubig, alang dapat ipa check. kung naka matik ka, you need to change your AT fluid. kung kaya pa, ipa change oil mo na rin.

pag-ahon mo in both cases (ke mababaw o malalim), mawawalan ka talaga ng brakes. drive slowly habang inaapakapakan yung brakes, in this way matuyo yung loob ng brake mechanism. pag umaraw-araw na, pwede mo na ring ipalinis yung brakes. pero pwede mong i-reschedule ito kung alam mong tagulan pa. pagdating na lang ng christmas mo ipalinis.

hope this helps.