Mercedes Benz repair: Wont start, mercedes benz 500sel, cylinder compression

Question
I have a 1985 Mercedes Benz 500SEL that won't start -- It has fuel pressure and good spark -- Any ideas what to check next?

Answer
How many miles on the car?
What is the fuel pressure?
Did you check spark at the plug or coil?

Possible:
#1. Bad fuel, fuel Injectors or bad injector harness.
#2. Weak = bad ignition coil.
#3. Bad ignition control module.
#4. No compression = worn out engine.
This is all blind guess without further diagnosis.

Start with a cylinder compression test.
A Mercedes only independent garage or dealer should have your diagnosis in a couple of hours.