I didn't know that E320 engines developed the "dreaded" DTC19 problem.

Of course, I know that V8s from '92 to '95 develop this problem and recently, it happened to me. The fix was to change the eprom which was successful. Monitoring the SA after the replacement eprom show a continued 'downward' trend to 0.8319.

At that point, I replaced the O2 and MAF sensors. After a month plus, the SA when back to 0.8534 at the last measurement.

But replacing BOTH of those parts is not cheap! An added bonus, was the increase in gas milage to 16mpg on the last fillup. At CA prices, it may pay for the parts, soon!

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Regards . . . . JimF
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'94 S500 Cpe

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