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Old 02-20-2008, 04:26 PM
Registered User
Join Date: Feb 2008
Posts: 2
Question Misbehaving 280Sl HELP!

Having a bit of a "punch up" with my 1984 280Sl. Seems to be missing, lumpy and down on power and up on fuel consumption!

I have changed:
Spark plugs
Spark plug leads including the one to the coil
Distributor cap
Rotor arm

I was beginning to wonder if it was the fuel injection, but that was all checked and found to be ok (K-jetronic)
Only thinks left are the ignition module and the coil which I guess ain't cheap.

Could somebody let me know was the ignition timing should be please!

Plus to cap it all the indicators and the hazard warning stopped working two days ago and it's MOT is next week!
Thanks in advance for any help

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Old 02-20-2008, 06:27 PM
nobby's Avatar
Automotive Nobbiest
Join Date: Aug 2005
Location: Barrie, Ontario
Posts: 821
What did the old spark plugs look like? What is the running condition when cold at idle? When hot? How does it run at higher speeds?
Could be the warm up regulator.
The ignition timing is posted on a sticker on the valve cover.
And finally, it sounds like the "Blinker" relay is blown.... 001 544 97 32 and if I remember, it is under the dash near the steering column. The part number should be stamped on it. But of course, check your fuses first.
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Old 02-21-2008, 04:01 AM
Registered User
Join Date: Feb 2008
Posts: 2
Thanks for the reply
It runs lumpy or "missing" cold and warm
The plugs look all the same, maybe running a little rich but not much
Unfortunately the sticker relating to the timing is long, long gone


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