IIRC the plugs can be tested easily from the relay contacts. I vaguely recall that there is also a simple test for the relay?
I had good success with only replacing plugs that tested bad. The effort of replacing plugs is per plug, so no real advantage to doing all at once. IME other plugs do not necessarily fail very soon after the bad ones. Greg -----Original Message----- From: Mercedes [mailto:[email protected]] On Behalf Of Meade Dillon via Mercedes Sent: Monday, November 30, 2015 12:59 PM To: Mercedes Discussion List Cc: Meade Dillon Subject: Re: [MBZ] W123 glow circuit Methinks you have a bad glow plug or two, test the plugs. Noise: alternator noise will be reproducible with no forward motion but increase engine RPM. ------------- Max Charleston SC _______________________________________ http://www.okiebenz.com To search list archives http://www.okiebenz.com/archive/ To Unsubscribe or change delivery options go to: http://mail.okiebenz.com/mailman/listinfo/mercedes_okiebenz.com _______________________________________ http://www.okiebenz.com To search list archives http://www.okiebenz.com/archive/ To Unsubscribe or change delivery options go to: http://mail.okiebenz.com/mailman/listinfo/mercedes_okiebenz.com
