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Originally Posted by Grammabud
Hi everyone, I am a new member with an old 380SL. It is an 85 with 230K miles. It was a gift, I think. After removing several bushels of pine needles and evicting the ant colony, it seems to be in unmolested condition. With about 30 miles of test running, everything seems to be in OK order.
My initial question is regarding the high idle condition after a cold start. It starts immediatly, (hot or cold) but idles very high (about 3000) when cold. As the engine worms up, the idle gradually reduces to a normal speed. Is this normal? Any advice will be most appreciated.
Many thanks in advance,
Grammabud
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I had the same problem with my project car a 79 450SLC, the Mercedes shop I took it to, did a couple of things. The tightened and adjusted the throttle linkage, as it was ready to fall off. the adjusted the air fuel mix and CO2 mix and fixed a couple of vacuum leaks. Now it is fine. But the first thought the mechanic had was the cold idle valve, which is usually the culprit. Your car is a muich later model and might have a computer module that controls all of this. So, I would recommed taking it to a good Mercedes shop which has diagnostic equipment or a dealer, As most private shop can't usually don't havethe proper diagnotic equipment and try and fix it the old way, replacing parts, so in the long run a dealer will probably be cheaper?