This is a very general answer, as I don't know what "running bad" means. I would start by changing the oil filter and filling it with new oil. I find that quaker state is the best. Next, I would change the spark plugs. Bad spark plugs and low oil can often cause a car to jerk and shake whether your driving or just idling.
Find out why it is only running on 2 cylinders. Can be bad spark plugs, defective coils, bad fuel injectors, defective spark plug wires, etc.
Look for a vacuum leak.
If you bought a warrnaty, call the warranty company and take the steps they tell you to. OR If you bought it AS-IS then you must FIX IT yourself. www.nationalautoinc.com
Get the car to a Mercedes service. Thats the only way to fix it!
You should explain to the car that smoking is bad for its health.
Take it to your local garage and have them fix it.
you have a blown head gasket
Daytime Running Lamps are automatic if you have the car turned on, in gear, the parking brake off and the ambient light is bright enough to not trigger the automatic switch. If however the car is on, it's in gear, the parking brake is off and the ambient light is bright and the day time running lamps are still off then you may need to just turn your headlights off. If that doesn't fix it, you may have a bad resistor, a burnt out light, a burnt out fuse or bad wiring. The first three are easy to fix. The last is not.
You have to replace it. They are designed to leak when they are going bad.
If you can jump it and get it running again, drive it for a few miles and then it dies again, it is the alternator. Buy a new alternator and it will fix the problem assuming you do not have bad connections "wires" in your charging system "your alternator and your battery".
Yes, it is possible to jump start a car with a bad starter, but not for very long. The car will eventually die again. It is best to take it to an accredited mechanic and have a professional fix the starter on your car.
fix my car