intermittent ignition problem
Thread Starter
Junior Member
Joined: Dec 2015
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From: Maine, USA
2003 E320 4matic wagon
intermittent ignition problem
My wife has a 2003 E320 4matic wagon. Has about 120k miles. Recently, I've had a couple of instances when I turned the key to start I got nothing. But after taking out key and reinserting,it worked fine. Is this indicating a future problem that is developing? I hate to get to the point when we turn it nothing happens and we"re stuck. Is there something I can address now? Thanks for any help.
MBWorld Fanatic!
Joined: Jan 2014
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From: Republic of Texas
'99 and '05 E55 AMG
Does this occur with only one or both of the key fobs? If it occurs with both, it points toward a poor connection in the EIS. If it only occurs with one fob, look for a bad solder connection on the key fob's circuit board.
MBWorld Fanatic!
Joined: Nov 2012
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A gaggle of MB's
1st - please make sure the thin "locking ring" around the ignition switch is tight, Many older W210's this ring can loosen and in turn give you "loose" key fitting. If you look closely at that metal ring - it has notches in it for a special MB tool/socket - but often the tips of a open needle nose plier's or scissors can be inserted across the ring to engage two nothces to clockwise/turn/tighten the ring.
2nd - "sometime" with our older fob's - the red plastic "lens" at the tip of the fob can get dirty/marred/scratched - that plastic tip can be rub/cleaned with a toothpaste/abrasive tip and damp cloth - to polish back to clean/nice
2nd - "sometime" with our older fob's - the red plastic "lens" at the tip of the fob can get dirty/marred/scratched - that plastic tip can be rub/cleaned with a toothpaste/abrasive tip and damp cloth - to polish back to clean/nice
MBWorld Fanatic!
Joined: Jan 2014
Posts: 3,969
Likes: 1,317
From: Republic of Texas
'99 and '05 E55 AMG
Here are 94 pages of awesome technical description of the drive authorization system in Mercedes Benz autos. Enjoy!
http://benzbits.com/DAS.pdf
Personally, I think this info should be placed in a sticky.
http://benzbits.com/DAS.pdf
Personally, I think this info should be placed in a sticky.
