On inline engines such as the Mercedes 5 cylinder engine, the number one cylinder is at the front of the engine (where the pulleys and belts are), and the cylinders are then numbered sequentially toward the rear of the engine, i.e. 1 2 3 4 5. The number 5 cylinder on your MB 2.4 liter 5 cylinder would be the one at the engine's rear.
Bring to dealer for repair
MB C240 is every 13,000 miles.
http://www.installuniversity.com/mb/w203/w203/fp.html
http://www.installuniversity.com/mb/w203/w203/ps.html
A slave cylinder of a C240 looks like a butt and it is found around the corner.
As it says under the hood where you expect it to be: Battery located in trunk. Look near the spare tire, under the trunk floor.
Cylinder nearest the radiator on the front of the engine.
For 3390 Device: 1 Track = 56664 bytes 15 Tracks = 1 Cylinder 1 Cylinder = 15 * 56664 = 849960 bytes (.85 MB)
The bolt pattern is 5 x 112mm. So far as I know this is standard for all MB's. The bolt diameter is 12mm.
5 kilobytes = 0.0048828125 megabytes
5 terabytes equals 5,242,880 MB
5 MB is 5000 KB