SL/R129: Morning Sickness
04-07-2018, 03:13 PM
#1
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Thread Starter
Morning Sickness
My 1997 SL500 just started acting up in the morning after sitting all night and when leaving work in the evening. At initial start, it coughs, backfires and barely runs. When I immediately turn it off and start it again, everything is fine and it runs very well. Recently, I replaced all spark plugs, coil packs and the fuel pressure regulator. I would be grateful for any advice. Thank you.
