ELECTRONIC IGNITION SWITCH

1997- Present: ML320, ML430, ML55AMG, ML280CDI 4matic, ML320CDI 4matic, ML420CDI 4matic, ML350 4matic, ML500 4matic, ML63AMG 4matic, GL 320CDI, GL420CDI, GL450, GL550, GLK220CDI, GLK280, GLK350, GLK320CDI, GL350 CDI, GL400, GL500
Post Reply
Mickey
C Class
Posts: 33
Joined: Mon 13 Apr, 2015 12:04 pm
Model you own: w164
Location: Sutherland Shire, NSW

ELECTRONIC IGNITION SWITCH

Post by Mickey » Thu 01 Sep, 2016 3:43 pm

Last week an intermittent fault started. I would turn the key in the ignition and nothing would happen. No dash lights, no steering wheel moving, no engine cranking. Turning the key on and off a few times would get it working and everything would be OK again.
I presume the culprit will be a faulty electronic ignition switch (EIS) as the it doesn't matter which key I use and I have a new car battery and key batteries. The car unlocks fine with the key remote and there do not appear to be any other issues. If it is the EIS, is this something that could be a do-it-yourself item to replace or does it need dealer programming into the car's main computer or to be made compatible with the key codes?
Technology is great when it is working.

User avatar
Tony From West Oz
OZBENZ moderator
Posts: 3094
Joined: Mon 20 Jun, 2005 10:04 pm
Model you own: w202
Location: Bedfordale WA

Re: ELECTRONIC IGNITION SWITCH

Post by Tony From West Oz » Thu 01 Sep, 2016 6:00 pm

Replacement of the ignition switch does require the use of a 'master key' (for the want of a better description) and for it to be paired with the ECU. I have had this done at my independent Mercedes specialist. You should check if your inide. can do it or if you need to go to the $tealer$hip to get it done.

Did you pull the key out each time you tried it or was it still in the lock? I had an issue (much later than the above replacement) where the little door over the key opening was stuck open. The key would not unlock the steering or do anything. Once the little door was closed, all worked properly. It was lightly lubed and has not had the problem since.
Regards,
Tony
Life is a journey, with problems to solve, lessons to learn, but most of all, experiences to enjoy.

'83 W123 300D 325000km (Wife's car Josephine - sold).
'84 W123 300D replaced good OM617 912 with OM617 952 and enjoyed having good acceleration for the first time since first driving a 300D in 2002 - became engine and trans donor for 300CD Turbodiesel conversion. Now parted out.
'86 W124 300D sold (Wife's old car - sold )
'85 W123 300CD, 275 000km (Fatmobile) rebuilt turbodiesel from previous Fatmobile transplanted into 280CE (occasional tourer)
'99 W202 C250 Turbodiesel (my darling Wife's car - Sold)
'98 W202 C250 Turbodiesel (my car - Sold)
'06 Ssanyong Musso Crew Cab 2WD Ute (OM662 diesel and Auto Transmission)

mattml430b
C Class
Posts: 44
Joined: Sun 10 Jul, 2016 6:52 am
Model you own: w163

ELECTRONIC IGNITION SWITCH

Post by mattml430b » Thu 01 Sep, 2016 9:06 pm

The key sink is around the outside of the ignition switch and can be removed separately. The ignition switch is more mechanical so to speak.
Sorry is this a W163. ML
Image
Image


Sent from my iPhone using Tapatalk

Mickey
C Class
Posts: 33
Joined: Mon 13 Apr, 2015 12:04 pm
Model you own: w164
Location: Sutherland Shire, NSW

Re: ELECTRONIC IGNITION SWITCH

Post by Mickey » Fri 02 Sep, 2016 12:44 pm

It didn't matter if I pulled the key out or not, the fault was still there. I even cleaned the key socket. Looks like a trip to the stealership if programming is needed. Thanks for the input and photos.

Post Reply

Return to “W163-166, X164-166 & X204-205 ML, GL, GLK / GLC / GLS Class SUV's”