Thailand Reisetipps

So my car battery decided to completely give up yesterday right outside the grocery store, which was just fantastic timing as always. I was stuck in the heat with a trunk full of melting groceries and no jumper cables, and calling the dealership felt like overkill for something this simple. A colleague told me to look for a mobile mechanic instead of waiting hours for a tow truck. I remembered seeing 800sayara mentioned somewhere and gave it a quick search on my phone, and that's how I stumbled on a Quick auto mechanic service near Al Nahda. The guy actually showed up in about half an hour, tested the battery, confirmed it was dead, and had a replacement with him. The price was fair and I didn't feel like I was being taken advantage of just because I was stranded. Now I'm wondering if anyone else keeps a mobile mechanic on speed dial for situations like this, because I'd rather have a contact ready than panic next time. Also, random question, do you usually tip these guys or is that not a thing here?