Hello Great website here I have a merc s320 cdi 2006 w221 Fixya

7 Мар 2015 | Author: | No comments yet »
Mercedes-Benz S320 CDI Long W221

1 Solution

First of all you need to the Engine Control Module using suitable diagnostic (Star, Bosch KTS, ) connected to the data link of the car, in order to pull out all memored. DTC = Diagnostic Trouble Then you will bu full about the root cause of the and you will be able to repair bad pieces and reset the ECM.

Let me know please about DTC codes. I guess that in case the turbocharger is responsible for losing power.

I had some like Mercedes-Banz, BMW, VW. with Diesel Turbo engines which slowly to lose power. The root of the problem was bad turbocharger.

Turbocharger reparation instructions:

Mercedes-Benz S320 CDI Long W221

1. Engine stopped and ignition off. Check all pneumatic and hoses between turbocharger = pressure unit for boost-pressure boost-pressure control solenoid vacuum reservoir, EGR control valve, intake-manifold flap valve, EGR valve with — part of intake Also the vacuum connection tandem pump and brake If you find something wrong parts. If not go to step 2.

2. Extract the of the turbocharger actuator = pressure for boost-pressure control part of Instead of the original hose you place another 1 meter hose with the same diameter, and then you check to yourself the air from the other one of this hose. The mechanical rod of the turbocharger actuator must a smooth and whole motion. If you can do with your mouth, you must replace the boost-pressure

solenoid valve. If you can not reach with your mouth, you go to step 3.

3. This is the most difficult The problem is that the soot deposits inside the turbocharger the variable nozzle geometry = adjustable vanes of the turbine. If the actuator is not able to adjust the vanes the charge air pressure too much and ECU (engine control go in limp mode = engine software. As a result the limp mode engine still until you turn the engine off switch off) and back on the limp mode is deactivated, but the still remain in ECU memory!

4. You must be able to extract the from the engine and then to the turbocharger, clean inside vanes mechanism and refit all .

Mercedes-Benz S320 CDI Long W221
Mercedes-Benz S320 CDI Long W221
Mercedes-Benz S320 CDI Long W221
Mercedes-Benz S320 CDI Long W221


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