1997 Mercedes 300E diesel, 186K. Multiple instances of Check Engine Lights, Oxygen sensor replaced 2x. Engine has stopped unexpectedly while driving, 2 codes (Check Oil Pressure & ETS) , alternator replaced, tension belt replaced. Both times that engine died restarted after after short time. Mechanic unable to replicate or find problem codes.

Hello

The Engine and Automatic Transmission (not applicable to manual transmissions) in this vehicles drive train are fully electronically controlled by a computer called the PCM and TCM (Power Train Control Module, Transmission Control Module). When a problem like this or other drive-ability related problems occurs the computer stores a record of the problem (there are of course some exceptions to this, like the fuel pump, engine coolant temperature sensor and MAF sensor for instance) in the form of a fault code in its memory, to read these fault codes you must have the systems memory scanned with a special tool. Once the fault code(s) are read you then must perform the appropriate diagnostic testing to find and resolve the problem(s) DO NOT REPLACE ANY PARTS UNTIL A TRAINED TECHNICAIN HAS DIAGNOSED THE PROBLEM TO AVOID SPENDING YOUR HARD EARNED MONEY ON PARTS THAT MAY NOT CORRECT THE PROBLEM. Also always check fuel pressure for correct spec for your make and engine type.

Hello
The engine and automatic transmission in this vehicles drive train are fully electronically controlled by a computer called the PCM (Power Train Control Module). Whenever a problem like this occurs the computer stores a record of the problem (there are of course some exceptions to this, like the fuel pump, engine coolant temperature sensor and MAF sensor for instance) in the form of a fault code in its memory, to read these fault codes you must have the systems memory scanned with a special tool. Once the fault code(s) are read you then must perform the appropriate diagnostic testing to find and resolve the problem(s) DO NOT REPLACE ANY PARTS UNTIL A TRAINED TECHNICAIN HAS DIAGNOSED THE PROBLEM TO AVOID SPENDING YOUR HARD EARNED MONEY ON PARTS THAT MAY NOT CORRECT THE PROBLEM

my 1989 mercedes benz 300e engine light flash on and off can any one plz tell me what the problem is my email is [email protected]

Under the passenger foot well underneath the car on the exhaust and the wire runs through the body under the passenger carpet.

On the driver side strut mount in a tootsie roll sized case.

try removing battery and cleaning all the ground under the battery tray and check main ground wire from battery to engine

the oil filter of m103 engine located an the left back of the engine

cylinder 6

you will see the black plastic can, that's it.

First the sensor in the rear gearbox may be bad or corroded for sensing wheel speed. Also the engine wiring harness may be falling apart. From 1991-1995 the US made MB use biodegradable material on the wiring. When the insulation cracks you get shorts in the system. The same wires are in your EHA on the air inlet area. Check and replace as needed.

hello,yes you have a 6 cylinder petrol engine,engine 103 have a tensioning device,it has a torsional torque to keep constantly in tension,no need to adjust,if your belt is loose,maybe your tensioning device need tobe check,ty

I would start by replacing your automatic air intake and throtle body sensor. Check these 2 things out and let me know.

tepfy