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I hve recently attempted to bring my 1998 w163 ml320 auto petrol back on road after it sitting for ten monhs plus i replaced battery on car and on fob my fob is no longer working so i have been told it wont start because of immobiliser feature it cranks and trys to start but doesnt my alarm and hazards go off also i am aware and plan to do full service on engine oil and transmission once i hear it start to save buying it all and still wont fire up it has enough petrol and have sprayed easy start and it is firing just wont start i am today gonna check fuel filter isnt clogged too much but have been stuck it does the same when jump starting also attempts to start but just will not no codes come when checking? the battery in it was 12v 63amh i replaced with 12v 70amh could this be the issue also maybe?Any help would be greatly appreciated and if any more detail needed please let me know i am new here and far from a mechanic just seeking advise fellow owners
Last edited by Simeonml320; 02-21-2021 at 03:42 AM.
The key fob has a small chip in it that communicates with the car. if it's not recognized you will get a start error message in the instrument cluster.
Others might chime in but search for this it's been answered plenty of times. Next to the low range button in the center stack there is a red light blinking. I forget the sequence but that would also let you know that the key is working.
I have read through a few posts relating too it but my case is slightly different i have no message saying start error it has a normal key without the fob that has always started it as soon as i connect my battery my alarm goes off i have charged battery overnight and been advised by previous owner possibly the £10 petrol was not enough to start it and to put another £10-15 in as was sat for a while and try start again then am i right in thinking the fob activates and deactivates the immobiliser or can my other key with just the blade and if anyone can clarify that the fob not working causes this attempt to start then cut off thank you for reply and help greatly appreciated i know this is widely covered on here and i have looked through a few posts if possible i am going to upload a video of my attempts today then can hear and see what i do incase anyone who is experienced with this model can help thanks for help in advance and taking time to reply
Last edited by Simeonml320; 02-21-2021 at 11:27 PM.
Did you jump start the suv with the key fob in the ignition?
i think it was my valet key in ignition wen i jumped but im not sure tbh possibly could of been fob will this for sure kill the key if it was the fob in ignition and if so shoukd it atart with my oher key with just the blade or is it a whole new key fob i need?
Does the key look like this? This is what you will get from the dealer, programmed by MB and has a transponder inside. If so, then yes I use one of these everday.
i think it was my valet key in ignition wen i jumped but im not sure tbh possibly could of been fob will this for sure kill the key if it was the fob in ignition and if so shoukd it atart with my oher key with just the blade or is it a whole new key fob i need?
If you jump started with either the fob key or the valet key in the ignition, then there's a good chance you've fried your chip in the valet. The key is useless now.
Obtaining a replacement valet key from the stealership, may or may not work.
02-21-2021, 03:38 AM
