Fellow NG members:
Purchased a code reader and pulled the following from my 98 E320 w/ 61,000 on the clock:
P0173, P0170 and P040.
Reads as though all the O2 sensors capped out, but I'm not sure. Here's why: The check engine light flutuates between on & off, depending upon how much gas is in the tank. I changed the gas cap. No effect.
Thanks in advance for your help.