Opening the coolant cap on a hot engine
A pressurised cooling system holds coolant well above boiling point, and cracking the cap releases it as scalding spray. It is the most common self-inflicted roadside injury there is. Switch off, wait a genuine thirty minutes, and let the attending technician judge when the system is safe to open.
Serial jump starts on a battery that is finished
A battery past its second or third UAE summer that needed one jump will need another within days, and each deep discharge weakens it further. Paying AED 150–250 per rescue several times over costs more than replacing the battery in the bay on the first visit, and it strands you somewhere worse each time.
Letting the tow decide the workshop
Agreeing mid-tow to the driver's suggested garage hands your negotiating position to a stranger with your car on his deck. Decide the destination before the truck arrives, your trusted workshop, the agency under warranty, or your own parking while you compare repair quotes, and confirm the full price to that destination in writing in the app before loading.