My 97 E320 wont start. It cranks and cranks but wont turn over... Is it a fuse or something? Please help me and give me detials on what and where to look at.

Crank Position Sensor located on the top of the trans bell housing on the drivers side where trans connects to engine. Can see it from the top peeking between engine and firewall with flashlight.

Part available on "buy parts" tab above.

You've checked it has fuel already, right?

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Terry Allison
N. Calif. & Boca Chica, Panama

09' E320 Bluetec 77k (USA)
09' Hyundai Santa Fe Diesel 48k (S.A.)

Thanks, I will try changing that today!!! yep it has almost a full tank!!! I hope this works. I have spent over a thousand dollars working on it now.

I would do a fuel pressure test first....

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A Dalton

You initally made it seem as if this was a recent and sudden problem, which apparently it isn't.

If you've spent $1000, someone surely has already considered the CPS; listen to Arthur and tell us the whole story the first time out and you'll get better advice.

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Terry Allison
N. Calif. & Boca Chica, Panama

09' E320 Bluetec 77k (USA)
09' Hyundai Santa Fe Diesel 48k (S.A.)

Might want to spend another GRAND and then do a 30 sec FP test..


The point we are making here , is we are giving you the FIRST things that COULD cause your problem, without knowing anything except your complaint of no start.
So, we know that any engine won't start if it has no spark or no gas, so that is where we have to start w/diagnosis...

CPS is a common cause for 'NO Spark" condition , and no FP is a common cause for" No Gas" condition..and BOTH are common causes for a No Start complaint.

So, where did the first G-Note go ?????

The reason I mention Fuel Pressure is b/c you can take the cap off the test port and press the little valve in with your finger and see if there is Fuel Pressure there [ use a rag]..if there is NOT, then you can have a blocked fuel filter, a bad fuel pump, a resticted line , a blown fuse, a bad FP relay , etc etc etc...so, you see why testing is the first choice..then you can save that extra Grand for the CD. If you have pressure with the finger test [ a gage is better for the test], then you kinow you probably don't have Spark and the Crank sensor should be tested....

I used to assume if a guy spent that much $$$$ on diagnosis that these test have already been done, but the last few years of hangin' ' round here, I have realized that I was way wrong on that conceptual thinking and have learned to assume NOTHING..
We have seen so many OVP relays changed AFTER the $2K amout was reached , that we realize it is quite alright and acceptable to just shotgun/parts change today and that when all else fails , read the instructions...
So...again,..my first test would be FP...mainly b/c it cost nothing, is easy to do, and will tell you plenty of info to lead you in the right direction of proper diagnosis before changing a part.
If you are no so inclined for these simple test, then I would call the guy you gave the Grand to and ask if these test were done and what was the results of the test??? He owes you at least that......
...or did yuou shotgun it yourself...????

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A Dalton

Where is the test port to check the fuel pressure?

Okay, I checked with the guy that worked on it and he changed my fuel filter and pump out cause the pump was going bad and now I checked the fuel pressure and its good.

Most dealers will not accept return of an electrical part once it has been installed (and yes, they can tell). You will want to be fairly certain that you actually need the part.

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08 W251 R350
97 W210 E320
91 W124 300E
86 W126 560SEL
85 W126 380SE Silver
85 W126 380SE Cranberry
79 W123 250
78 W123 280E
75 W114 280

the security system allows the engine to crank but the engine won't fire. ..did you at least do the excercise of making sure the security system is disabled

Are you sure about this? I've never engaged it on my W210 but on other cars I think I was not even able to crank when security was enabled???

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08 W251 R350
97 W210 E320
91 W124 300E
86 W126 560SEL
85 W126 380SE Silver
85 W126 380SE Cranberry
79 W123 250
78 W123 280E
75 W114 280

hay have you checked the fuel injector pump beacause i had a problem liek that before with one of my other cars and that got it worken againbeacuse it would try to turn over but nothin would happem

where is the cps located on 97 mercedes e320? need help fast!!!

I just bought 97 Mercedes e320. im trying to fix up. the guy I bought it from said someone ran a diagnostic and told him it had a burnt valve and needed new motor, hopefully this isn't correct, I have been tring to crank but it sounds like fuel isn't getting to the injectors. I am missing owners manual and fuse chart for all 3 areas,

the car is sitting off balance with the tire under fuel tank all the way flat, I have added premium from gas can and fuel is reaeding low in cluster, I was wondering if sending unit reading could be inaccurate due to imbalance from tire,

also I put battery in and something is draining it , when im not trying to crank, I was wondering if the car phone could be doing this and what to do?

thankyou any help is greatly appreciated

The fuel tank on these cars is in the trunk just behind the rear seat back not under the car. The fuel pump / filter is under the car, just in front of the left rear wheel ( there is a plastic cover over the pump / filter ) .

A burnt valve won't keep the engine from running. Did they say what cylinder has the burnt valve? If not they are probably just guessing.

We need more information, what is the history for the past year of this car?