100,000 mls. Engine in excellent condition, recent plugs, and all filters. No (zero) oil burned at 5,000 oil change. Typically this baby is quite fast.
I recently am experiencing a stumble at highway speed after a healthy deceleration, say from 85 or 80 down to 50 or 60. After this period of deceleration, the engine falls flat and stumbles on attempted acceleration. The stumble will last for 1/4 to 1/2 second, and then the engine will pick up.
Any ideas?
Could it be the device that shuts off the fuel during deceleration?
What about old plug wires? Three of the cylinders have short ignition wires to the plugs. Do these ever need replacement?
Has your car had the engine wiring harness replaced? It is one of those known to have a harness that bio-degrades before you have finished with it. I am not saying that this is necessarily your problem, but if it still has the original harness it may be. Sorry if I am the bearer of bad news. Search this and other forums for something like "W124 wiring harness" and "M104 wiring harness".
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Technical Officer, Mercedes-Benz Club (NSW) Inc. www.mbcnsw.org.au
107.023: 1973, 350SLC, auto, icon gold, parchment MBtex.
107.026: 1981, 500SLC, auto, thistle green, green velour.
124.090: 1990, 300TE, auto, arctic white, cream-beige MBtex.
201.028: 1990, 190E-2.3 Sportline, 5-speed manual, arctic white, blue leather.
201.028: 1990, 190E-2.3 Sportline, auto, signal red, black fabric (parts car, currently dismantling).
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