1993 Mercedes 190E won't start

I have a 1993 Mercedes 190e that I bought used some time ago. About 170k miles now. Only thing I have done is replaced the water pump myself with the help of the experts here.

Want to know what to check first. I have moderate skills. I turn the key and I only get a hissing sound, maybe from the front driver side underneath the vehicle. The battery is full power, there is no clicking sound, just a hiss. Tow truck driver said it's probably the starter. How can I test to find out? Of course I have to do it myself because I don't have much money.
Thanks
Art
artismobileAsked:
Who is Participating?
I wear a lot of hats...

"The solutions and answers provided on Experts Exchange have been extremely helpful to me over the last few years. I wear a lot of hats - Developer, Database Administrator, Help Desk, etc., so I know a lot of things but not a lot about one thing. Experts Exchange gives me answers from people who do know a lot about one thing, in a easy to use platform." -Todd S.

CompProbSolvCommented:
The first trick is to pin down the origin of the sound.  For that you will need an assistant to turn the key while you listen.

It is VERY easy to get deceived about the location of a sound when inside the passenger compartment.

I don't know that car, but there may be a starter relay that is chattering to cause the hiss.  More likely, the relay is part of the solenoid which is typically piggy-backed on the starter.

If it does sound like it is coming from the starter or solenoid, give it a brisk hit with a solid stick to see if you can shake it loose.  That won't be a long-term fix but will clarify the source of the problem.
0
artismobileAuthor Commented:
Very good suggestion. I will try that tomorrow.
Thank you.
Art
0
Tiras25Commented:
Any smell of smoke like a short and electrical wires burning?

Normally the hiss sound the starter rotating.
0
Introduction to R

R is considered the predominant language for data scientist and statisticians. Learn how to use R for your own data science projects.

artismobileAuthor Commented:
I have not had the opportunity to have someone turn the key while I listen. There is no smoke or smell. No bad spot on a starter like when you turn the key and it clicks. Just a hiss, almost like older cars when you hear the fuel pump priming, best I can describe.
0
Michael-BestCommented:
The hissing sound indicates a poor connection somewhere.

Check all cables from battery to the starter.

Probablly a coroded or loose connection.

Remove and scrape clean the starters connectrs and batteries connectors back to clean metal, then reconnect them.

You can bypass the solenoid of your starter with an insulated screw-driver across the terminals to rule out that the soleniod is faulty.
 
If this does not solve the problem , then I would suggest the replacement of your starter motor.
0
artismobileAuthor Commented:
Ok,
And that would rule out a simple fuse, right?
0
artismobileAuthor Commented:
Ok,
took me that long to even find the starter.  What a hideous place to put anything! It butts up tight the the bell housing on the transmission on the drivers side, no way can I reach the solenoid.

I did learn the hissing sound is underneath, like when the fuel pump is priming. the only other sound I hear is where the ABS is located.
0
Michael-BestCommented:
Because you cannot reach the solenoid.
Remove the starter to clean the soleniods cable connectors and test that the starter works by direct connection to the battery.

See:
http://www.youtube.com/watch?v=BAjMO3Zu88s
0

Experts Exchange Solution brought to you by

Your issues matter to us.

Facing a tech roadblock? Get the help and guidance you need from experienced professionals who care. Ask your question anytime, anywhere, with no hassle.

Start your 7-day free trial
It's more than this solution.Get answers and train to solve all your tech problems - anytime, anywhere.Try it for free Edge Out The Competitionfor your dream job with proven skills and certifications.Get started today Stand Outas the employee with proven skills.Start learning today for free Move Your Career Forwardwith certification training in the latest technologies.Start your trial today
Automotive

From novice to tech pro — start learning today.