I have a 1997 E320 inline 6 w/108k and I’m having misfires. The check engine light comes on with the check engine electronics. The code for the check engine light is for bank one O2 sensor and multi misfires. I have been to a few mechanics that works with Mercedes but so far just a lot of money spent without helping the problem. Thus far, the MAF, O2, cam, and crank sensor have been replaced. Also, the fuel filter has been replace, the fuel system was cleaned and checked, and the engine was compression check @ around 180 each cylinder. Just looking for any pointers that maybe help me with my problem.
Vehicle: 2001 E320 - Brilliant Silver/Ash: MBCA member
Location: The Mountain State
Posts: 6,381
It sounds like you have a bunch of mechanics guessing about the problem and by process of elimination throwing parts (and your money) at the car. By the way, this is my day to state the obvious...
Most towns have an independent garage owned or operated by former Mercedes-trained techs. I'd look for one of those before spending any more money.
Hopefully someone here will have your answer, and good luck!
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Last edited by Musikmann : 07-02-2008 at 04:02 PM.
anyone checked the cat converters?straight 6 only has one bank of cylindersThe multiple misfires mean they all are affected which should lead them or someone to conclude your cat has gone bad.Test it and where are you located ? A universal cat can be spliced in.
ohlord
Hey, HiFi, his appears to be a wander set of misfires, if it was isolated that would help him out a lot.
spainhour5, I would guess that someone has checked the plugs, wires and connectors? If not those are worth a look and I agree with ohlord that a plugged up cat can cause all manner of issues. If the car can be safely driven go for a good ride and then stop (leave it idling) and look under at the cat. Plugged ones will run hotter and I have even seen them glow so it's better to do this at night. Glowing would mean it is highly suspect, not glowing would only mean it's not definite but still suspect.
And please complete your online profile re: vehicle and location as that is useful information.
The last thought I'd have is to check the engine wiring harness, older models sometimes see those creeping in as issues. Major harness issues in the W124 series, from what I have read as the 210 population has aged some of the older ones have had problems.
Good luck and keep us posted,
Greg
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anyone checked the cat converters?straight 6 only has one bank of cylindersThe multiple misfires mean they all are affected which should lead them or someone to conclude your cat has gone bad.Test it and where are you located ? A universal cat can be spliced in.
ohlord
+1
I went the plugs, wires, coils route when my E55 threw misfire codes despite the advise of a sage MB tech. I figured no way a catalytic converter could be bad and still pass CA smog, right? I was wrong.
Vehicle: 2001 E320 - Brilliant Silver/Ash: MBCA member
Location: The Mountain State
Posts: 6,381
Quote:
Originally Posted by MaxVon
+1
I went the plugs, wires, coils route when my E55 threw misfire codes despite the advise of a sage MB tech. I figured no way a catalytic converter could be bad and still pass CA smog, right? I was wrong.
Max,
Funny you should mention that. I was talking with the MB tech who replaced my cats today and he said several of his customers (when he had his own shop in Ohio) ran with gutted cats. Those cars all passed the state emission inspection.
Vehicle: 2000 E430 summer and 1988 420sel for the winter
Location: Yorkville, Illinois
Posts: 15
The M104 motor is famous for bad engine harnessess, check to see how crispy your wiring is, take a razor blade and cut open the harness, just slice the wrapping and check the wires, i bet the coating has come off and therefore causing your misfiring
The M104 motor is famous for bad engine harnessess, check to see how crispy your wiring is, take a razor blade and cut open the harness, just slice the wrapping and check the wires, i bet the coating has come off and therefore causing your misfiring
X2 - though I thought the wiring harness issue was more with W124 chassis and the M104 combo, not the W210/M104 cars? Could be wrong though.
X2 - though I thought the wiring harness issue was more with W124 chassis and the M104 combo, not the W210/M104 cars? Could be wrong though.
The W124 is well known for the engine harness. The W210 has been far better but there are a few reports of it, particularly with the early L6 engine and MYs.
Misfires Help! 
The multiple misfires mean they all are affected which should lead them or someone to conclude your cat has gone bad.Test it and where are you located ? A universal cat can be spliced in.
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