Help with 97 S500 119/140

[blueriomedina]

Need help diagnosing probable cause of the S500 running rough, shaking quite a bit at idle, it drives at normal speed but rough. Stop by a local AutoZone to get a quick diagnosis and the following troubleshooting came up: (using their scanner)
P0442
Definition:
EVAP (evaporative emission system) small leak/no flow condition.
Explanation: The evaporative emission system is monitored for its ability to hold vacuum.
Probable cause:
-defective or loose fuel cap
-EVAP canister or hose cracked-not connected
-Purge or vent solenoid defective
-Vacuum leak at engine

P0308
Definition:
Cylinder misfire detected-cylinder number 8
Explanation: The powertraincontrol module monitors the crankshaft speed and has detected a misfire condition
Probable cause:
-Ignition system fault-spark plug(s), ignition wires, coil
-vacuum leak
-injector fault
-high or low pressure

I would like to attempt to hopefully solve the problem before I have to take it to the MB dealer for a diagnosis.

Can anyone familiar with the S500 V8 can tell me the cylinder order, when standing in front of the engine (attached pictures)

All the help will be appreciated

Bluerio