My car (98 W210) began to have a lumpy start so I checked the GP's at the relay. All showed .6-.8 ohm except one which was infinite. No CEL's so far. A week later, starting seems to be worse and now I have a CEL and the GP light stays on. Had one plug on hand so I changed the known bad one. Tested the others at the GP and 4 showed .8-1.1 ohm. One showed .6. After starting the car I still have the CEL and the Glow light is still staying on. Are the readings high enough to warrant changing the other plugs? Will the CEL reset on its own or will I have to reset it?

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Muleears
'07 E320 Bluetec 133K my DD
'04 Jaguar XJ8 VDP, 34K
'10 Hyundai Accent 60K Grocery Getter
'02 VW Golf soon to be on the road again
'97 E300 Diesel Son's DD
'61 VERY tolerant wife

Hampton Roads, VA USA

Gone but not forgotten:
'67 250S 95K
'86 300SDL
'87 300D Turbo, 364K! R.I.P.
'98 E300 Turbodiesel, 213K
'02 S420, 164K
'01 Prius 138K