car: 1995 s500 sedan w140

Hey guys.

Today I started the car up after 5 days and when I started it up it wasn't making a full start... it made a funny sound during the startup... I was on the road on a left turn light to get into sams club and the left side of the car was shaking strangely (felt like a very loud sound system shaking the car) but I have no idea what it was....anyways I pull into sams club and put the break and the car shuts off???? I turn it on...accelerate a little and it turns off again... gave it some rest and turned the car on for 5 minutes before starting on the road again....seems fine now...

any idea as to what this could be..I know it could be a million things but just curious... car has 119,000 miles on it.. thanks..any help would be appretiated...