SL/R230 Engine idol. - MBWorld.org Forums

Oct 29, 2017 | 01:24 AM

hydrogen

Thread Starter

Member

Joined: Dec 2015

Posts: 104

Likes: 13

2005 SL500

Engine idol.

Hi.
I have a 2005 SL500.
The engine idol seems to be a bit high at 600-650rpm.
Does anybody know whether the idol can be adjusted. I am told it can't.
Thanks.

Oct 29, 2017 | 02:26 AM

MacVidMB-V8

Super Member

Joined: Oct 2012

Posts: 538

Likes: 89

From: Hollywood, CA

W209, W124

Is it an American Idol or no?

If you mean Idle, I don't think you can.

Oct 29, 2017 | 10:38 AM

gafitanu

Senior Member

Joined: Jul 2008

Posts: 436

Likes: 64

From: Dartmouth, MA

1967 250SE, 2022 GLC300 2023 EQB300, 2018 AMG GT

600-650 rpm is the correct idle for M113. It varies a little depending on the coolant temperature and other factors. Idle has not been adjustable since the introduction of ECU’s on all cars.

Oct 29, 2017 | 11:36 AM

kbob999

Super Member

Joined: Jul 2014

Posts: 992

Likes: 245

From: Tucson, AZ

'20 X5 M50i; '17 Ram 3500; Golf Cart; Bikes; Scooters

I believe you can adjust idle with a SDS, and developer mode, but if it’s the right RPM I wouldn’t bother.

Oct 29, 2017 | 03:41 PM

hydrogen

Thread Starter

Member

Joined: Dec 2015

Posts: 104

Likes: 13

2005 SL500

Haha. Yes sorry idle not idol.
Thats sounds like what I had been told but I wanted to check with MBWorld.
Thanks.

Oct 29, 2017 | 05:39 PM

Rudeney

MBworld Guru

Joined: Dec 2009

Posts: 10,782

Likes: 1,011

NO LONGER ACTIVE

Quote:

Originally Posted by gafitanu

600-650 rpm is the correct idle for M113. It varies a little depending on the coolant temperature and other factors. Idle has not been adjustable since the introduction of ECU’s on all cars.

Actually, many cars with electronic fuel injection had adjustable idle speeds when they used a hardwired throttle. They had set screws that adjusted the throttle butterfly closed position, just like in the old carburetor days. The drive-by-wire throttle is when any mechanical idle adjustment went away. As kbob said, you can adjust it with SDS. There are adjustments for idle speed both in park/neutral or in gear. My CLK's M273 engine would idle just a bit roughly in drive with hot weather so I bumped it up by 75rpm to smooth it out. Likely it was due to the crappy "summer formula" gasoline we are forced to use.