HI I HAVE MERCEDES S320 MODEL 1995 ,THE PROBLEM IS TTHE ENGINE DOES NOT START ,WHILE THE BATTERY IS FINE ,THE LIGHTS ARE OK BUT DOESN'T START.

their are some electrical issues with s320 throttle valve electric failure --coil pack failure -- check fuses and relays then check battery and connections and try to start with boost if starts check and test battery and alternator --and check the wiring connections for loose , frayed , damaged ,and corrosion the following link are some of the problems acossiated with your vehicle
Newest Problem Reports for the 1999 Mercedes Benz S320

Does the engine spin or just click when you try to start it? If it just clicks or there is nothing try checking your battery cables, they may have become loose or they are corroded.

Also because you said you were driving uphill and it started to lose power then died, it could very well be that your fuel pump decided to stop working.

FAULTY ELECTRIC SERVO VALVE

my battery is out of order.i can not open port bagage.
from where i can supply external source to start engine?

first lock the car and unlock by remote key then start, try this few times if not start by it need to call technician.

Does the car start in Neutral? If it does then Park sensor switch is cactus.
Not sure of the fix but my S320 does this, sometimes starting OK in Park, sometimes not.

It dies after start since not having fuel. There are several factors needed to be checked:
1-Fuel injectors got clogged up or injector module control is having a problem.
2- Not having correct fuel pressure due to fuel filter gets clogged up.
3- Fuel pump is weak not delivering correct rate per spec.

check fuses , battery in remote . and make sure the car in park

radio ask for code

Hi

Get the fluid checked in the gearbox, it could be the slave cylinder on it's way out, or the clutch could simply be jammed. Also look around the gearbox for fluid leaks.

It is difficult to say but I think it's most likely just jammed.

Regards

Dan