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rpmdiag, Tech and Instructor
Category: Mercedes
Satisfied Customers: 8073
Experience:  Since 1975
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It wont start. it cranks but does not start. How do I check

Customer Question

it wont start. it cranks but does not start.
JA: Have you checked the engine's fuel supply? And the spark plugs -- are they all working?
Customer: How do I check these? Is there a manual I can follow?
JA: What is the model/year of your Mercedes?
Customer: 1999 Mercedes C230.
JA: Are you fixing your C230 yourself? What have you tried so far?
Customer: Ok, nothing. I just got the car from a friend who said he rarely drove it in the past 7 months. I was able to drive it home on Friday. This morning I tried to start it and it does not start. I am trying to get in touch with my friend to ask him some questions. Are there any specific questions I should ask him?
JA: Anything else you want the mechanic to know before I connect you?
Customer: It sounds like ti wants to start. I have been on the intrenet this morning trying to find answers. I just think I need to get a diagnostic test done. The mileage on the car is 120,207. I am hoping this car is worth fixing.
Submitted: 8 months ago.
Category: Mercedes
Expert:  rpmdiag replied 8 months ago.

Hi, I'm Ron and I will be helping you today.
Stand by for a moment while I prepare your answer.

Expert:  rpmdiag replied 8 months ago.

The problem can be a loss of spark or fuel. You can check for
spark at the plugs with a spark tester. Check compression too for a
possible valve timing issue with a compression gauge.
You can check fuel pressure with a gauge and all of these tools
should be available to you at your
local parts store for rent or purchase.
You need to check for any stored codes in the computer with a
code reader or a scan tool.
The code reader only gives the codes and definitions, where the
scan tool gives you all
the needed data to diagnose the codes.
Thanks, Ron