ovp and codes
 

Once again, I was driving my 89 300sel when the check engine light came on. Then at idle, the idle would surge from idle to above 1500rpm. I went thru the process with the code unit...came up #4. Then I removed the fuse on the OVP and replaced...started car and no check engine light! no surge..everything running nicely. I am no electronic wizard but something is amiss. any suggestions?
Thanks
Warren

OVP data
 

OVP relay, Over Voltage Protection Links
http://www.peachparts.com/shopforum/diy-links-parts-category/209638-ovp-relay-over-voltage-protection-links.html


Code data..

Jim Forgione's DIY articles
http://www.k6jrf.com/MB_S500.html




Have a great day.