Mercedes 300E 1996 diesel. I cannot start my car because the immobiliser
will not disengage. I have changed the batteries in the key fob, I have
tested them to see if the IR light comes on and the recovery mechanic
checked them on his machine. I have checked the manual to synchronise the
sender/receiver (press fob twice) and its still no good (my spare key is
only 6 months old, it cost me £120). When I turn on the ignition I get
red/green flashing at the rear mirror receiver. The car cranks OK but will
not fire. Is there anything I can do before I call out Mercedes tomorrow?
I know one they are on the case it will cost me a fortune. In case it is
relevant, the car is kept in a dry garage and is only used about once a
My battery is about 3 years old, although untested , it has been OK and
starts the car first shot after 2 weeks idle. It is flat today though,
after flogging it yesterday. the glow plug light works OK. I am in danger
of calling Mercedes very soon!
I don't think it is the immobiliser that is preventing you from starting...
If you could... hook up a jumper cable to another car as usual and let that
car run... about 2000 rpm.
On your car... try starting with petrol pedal fully depressed... after the
glow plug light goes out. If it does attempt to fire up, the keep going. Do
not crank for more than 45 seconds at a time. and let 5 minutes to cool down
If it still does not attempt to start... are you sure you got enough diesel
in the tank? Maybe it could be your fuel pump.
Mercedes are rubbing their hands together as we speak. It was towed away
this morning with a completely flat battery. I will get myself a jump
start/charger unit this weekend. there was no juice left to do anything
more. Thanks for your help. I will get back with their solution later.
I hope you used the services of a motoring organisation if you were
appropriately covered. The tow should be free then.
Did it a few months ago. Could have had a tow (well, transport on the back
of a lorry) under the Mercedes Mobilo Life scheme but it would cost if not a
manufacturing fault (which it wasn't) so used the RAC. Saved 120 quid,
For direct contact replace nospam with schmetterling
"Charlie Brown" < firstname.lastname@example.org> wrote in message
Absolutely right. I was hoping that Mercedes would send an engineer to me
with a computer or gadget to bypass the immobiliser. They said they don't
do that anymore as all non starters are collected by a tow firm under
contract. They would have billed me for the transport cost to their nearest
distributor. Luckily I was covered by . FYI, the problem is the result of
a faulty K40 relay switch - total cost £300!
the flashing immobiliser was a symptom of the problem. The failed K40 relay
switch shut off power to the fuel pump and because of the power failure, the
immobilser lights flashed because they were on the same circuit. This is
explained as best as I understand it.
Motorsforum.com is a website by car enthusiasts for car enthusiasts. It is not affiliated with any of the car or spare part manufacturers or car dealers discussed here.
All logos and trade names are the property of their respective owners.