SL/R230: shut down and will not start
Thread Starter
Newbie
Joined: Oct 2013
Posts: 2
Likes: 0
1992 600 sel
shut down and will not start
1st post. 07 sl550 shut off in traffic and wouldn't start back. no cranking nothing. checked batteries but can't get any dash lights and font windows dropped 2 inches and will not seal. pulled started and had it checked (ok) batteries new. I have something going on with trunk battery not lasting. any help is welcomed. some thoughts are ignition switch or neutral safety switch. thank you
Super Member
Joined: Oct 2012
Posts: 538
Likes: 89
From: Hollywood, CA
W209, W124
Need battery voltages.
when you say “batteries checked” and “batteries new” ???
Did you recently replace the batteries? If so, why?
But you need to get a voltmeter on them now, we need to know current charge.
Does key turn?
Do doors unlock and lock?
when you say “batteries checked” and “batteries new” ???
Did you recently replace the batteries? If so, why?
But you need to get a voltmeter on them now, we need to know current charge.
Does key turn?
Do doors unlock and lock?
Thread Starter
Newbie
Joined: Oct 2013
Posts: 2
Likes: 0
1992 600 sel
new battery under hood (4 months) trunk battery was 12-14 months. key turns and not sure on locks. car has been down for 7 months +. aware 1 or both batteries will need replacement. using jump boxes/chargers right now for testing
Member
Joined: Jan 2003
Posts: 182
Likes: 18
From: Cedar Park, Texas
2013 Porsche 911 Carrera 4S, 2004 SL55, 2012 Lexus IS250, 2021 Toyota Highlander
Does the car eventually turn on? I had a similar issue where my batteries were fine. Turns out it was the crank position sensor. I haven't had an issue since replacing it.
Junior Member
Joined: Sep 2020
Posts: 44
Likes: 10
2009 SL550
...be very careful using jump boxes, if at all, only on front starter battery... you probably have an issue either with the charging circuit (alternator/voltage regulator), alternator charges rear battery, BCM charges front battery via DC/DC converter, or may have a large drain issue, need to check amp draw when locked...
Member
Joined: Jan 2003
Posts: 182
Likes: 18
From: Cedar Park, Texas
2013 Porsche 911 Carrera 4S, 2004 SL55, 2012 Lexus IS250, 2021 Toyota Highlander
