my engin fails sometime when i am driving
suddenly one bank fails but no indikation
with error code. when i stopping engine and wait
after a while it goes ok again.but the mailfunktion
comes again

 

hell, same here..you have a pre facelift? Mine is a 95. One bank fails when car got +/- 80 degrees. Before and after this temp runa Perfect :/

change, plugs, rotors, coils, (caps seems new) try 2 EZL modules from other car, try 2 LH modules from other too. Thinking about crankshaft position sensor failing

Fabio D.

 

Your car is in the 'last made' with the defective wiring harness insulation which turns to dust and causes shorts and lots of real bad stuff. Slit open the plastic jacket at a convenient hot spot and check it. If the insulation on the wires is cracking or worse, the entire harness must be replaced.

 

forgot to mention this! All wiring harness was replaced some years ago by the dealer (previous owner) I check And alls perfect

maybe a damaged CPS (2 in this engine) or maybe a Internal cracked distributor cap? But mine just fail at +/-80 degrees when full hot or bit cold 12cyl perfect

Fabio D.

 

What could cause this engine malfunction only when the indicated temperature is 80 degrees C +/- a few degrees? ??
Is temp sensor indication wrong? and ECU shutting off cylinders to avoid overheating damage? There are two (2) temp sensors--one for gauge, the other feeds engine computer. If the computer feed one goes crazy, the ECU will shut off cylinders to avoid engine meltdown. That is the only things I can fathom failing only at the narrow RANGE of temperature are the Temp sensor or/and the ECU,
IF the thermostat has failed AND the gauge temp sender is also faulty and not indicating overheat, but the engine ECU one IS properly sensing severe overheat and ECU shutting off cylinders to protect the engine.

 

make sense your kind reply mate. I will try the 2 temp sensors from the car of my brother (s600 95’ same engine). I do not make this prove before cause in my mind i think the hht scanner will detect the temp difference from the 2 sensors like the m119 (my father has one 500e And the scanner reads engine temp difference from b1 and b2 temp sensors) we replace all two And solve the check engine lights. But in my car i dont get that error code. Just MAF hot wire malfunction And i replace all 2 maf from my brothers car and still the same faulty

i will try the 2 temp sensors And update as soon

Fabio D.

 

can anyone tell me where temp sensor for engine i located

 

Check your engine wiring harnesses yourself. The 'new' harnesses will each have a FEBI tag around each harness assembly near the end connector. Lots of defective harnesses were 'in stock' in the parts supply system and got installed after MB decided to change to good insulation. Be sure and check the harnesses for the Electronic Throttle Assemblies. IF a New Old Stock (NOS) one was used, it will not have the FEBI tag on it.

 

hello
i found the trouble with my 600.it was temp sender to left bank.
problem solved.yeeeees

 

what temp sender are you talking about mate? Intake air temp? Or coolant temp sensor? My car has the problem yet :/

Fabio D.

 

hi.it was coolant temp sender

 

Many thanks mate! I will try

Fabio D.