You don't want a CS1000 scanner - it would be overkill. If your car is OBD II compliant there will be a sticker under the hood somewhere that says "OBD II compliant, and there will be socket under the dash, under the steering wheel somewhere. It's a 16 pin socket, 8 on each side that looks a little like a parallel printer port. If you have such a socket this is where you would hook up the OBD II code reader (or have Autozone do it for free), which you would buy at any auto parts store, Sears, WalMart, etc. for about $100 give or take. The OBD II compliance is required as of 1/1/96, but some cars met the requirement early. I believe your car is one that did. It is my understanding that 1995 C280s, S320s and SL320s were compliant. But the way to find out for sure is to find the port.

But your car definitely has a 38 pin diagnostic connector. This is located on the rear passenger side of the engine compartment, right on the top. It is covered by an oval black plastic cover. Unsnap that cover and you will see a round cap with a nut in the center. Twist and lift that cap and you will see the 38 pin connector. The famous Arthur Dalton code reader, built from Radio Shack parts, can be built for about $10 and used to read codes from this connector. But what Arthur is saying is that some 38 pin cars have an auxillary switch (sw) to read the CE codes without the code reader. If your car has it there will be a pushbutton and an LED light near the 38 pin connector. To read the CE codes from here you turn the ignition on, hold down the button for 3 or 4 seconds and count the number of flashes on the LED. The number of flashes equals the fault code. Do the same thing again to search for a second code, third code, etc.