Hello all:

I have a 1994 C220 with 75K, and here are my problems, in the last few months my car has been experiencing a significant lose of power, particularly in the area of acceleration. For some reason, it feels sluggish and that is being held back in the lower speeds.

In an attempt to correct this, I had a full tune up conducted from MB. And, although it seems to increase the performance somewhat, I still feel as though it's lagging in power. During the diagnostic the codes that were found were rear o2 sensor and upshift delay cable. My questions are as follows:

Will not replacing these two cause the problems described? Does the MAS always produce a code when it is faulty, and what are the signs of a bad mass air flow sensor.

Thanks in advance.

 

this doesnt really help you but i would definatly fix both of these problems anyway.... and then see if the problem persists afterwards, a MAS is easy to replace, and even if a new MAS corrected th problem you should also change the other parts.
That would be my advice