85 380 SE Idling higher lately
 

Our reliable 380 SE just started idiling to about 1200 rpm out of gear, 800 in gear. Was close to 550+ in gear.

Reving it or driving longer it does not impact it much. I pulled off the air cleaner housing and did a quick check of vacuum lines and other connections. Lubed throttle linkages. Any ideas what to check for next? About 170K on motor.

Thanks,
Steve :sun_smile

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Many posts on high idling 380's.

Same problem with mine. I replaced the idle control module (black box on the firewall) and that solved it.
Mike
1985 380SE
1984 500SL