S500 W140 immobiliser issue

[McDonald]

View attachment 49546 I'm having same trouble with my 1996 s320 w140.....immobiliser stuck on...and it's getting on my TITS as no one seems to no the answer or it's a secret ....my car only has 75,000 on it and the mot is due in a month..l don't want to scrap it

If you are a member of the AA (with home start and relay) they will transport the car to the garage of your choice if they can't sort it at the roadside. The transported mine 50+ miles to MBS when the need arose.

 

[General patten]

I read somewhere on a forum that the W140 key transponder comms with the security device on the car (induction coil around ignition barrel) in not reading the base code, but also shares a rolling code programmed into their memories. Will a mobile auto locksmith be able to read that stuff?

I suspect that when I first had the car running the fob battery was dead hence it didn't send any IR signal to the car to lock or unlock. Once I put new fob batteries in I suspect the commsgot out of sync. The owner's manual explains a resync procedure which I think I'll repeat this weekend.

Changed key fob batterys,put new car battery on it,locksmiths tested key and said no signal from transponder..done resync process...red and green lights in interior flashing at same time.....I have spent last 2months Reading MERC forums...ask looks Mercedes and they said cant get key fob no more

 

[LostKiwi]

@JohnnySBC (on here) repairs keys, RMK can source new ones.

 

[General patten]

@JohnnySBC (on here) repairs keys, RMK can source new ones.

I will give them a try

 

[General patten]

RMK in Birmingham are the people. Replacementmercedeskeys.com

I have just phoned them and they said can repair the key or reprogram a new one.....WOOP WOOP ...Dancing with joy.....thank you fellow MERC buffs

 

[Craiglxviii]

You’re very welcome.

 

[V6Matty]

Marks a really nice chap too, also if you visit the site it’s worth mooching over the road to MSL

 

[General patten]

Marks a really nice chap too, also if you visit the site it’s worth mooching over the road to MSL

What do they sell,do at msl

 

[LostKiwi]

What do they sell,do at msl

Remaps......

 

[General patten]

Remaps......

Can my 1996 s320 get remapped then

 

[LostKiwi]

You'd need to ask them!

 

[General patten]

You'd need to ask them!

Ok will do thanks

 

[LostKiwi]

Even if they can don't expect massive increases - you might get 10% or so.

 

[teddykan]

Tried mercedesreplacementkeys of Birmingham. They replied that they can't do the W140. At most they could repair a faulty key. But they think that the IR jey must be ok as it works the central locking. So they don't believe they can help.
I'm trying to get to the R38 starter relay to force an engine start even when immobilised. Any advice on where this is?

 

[teddykan]

I'm with AA,I had more knowledge than he did lol...

Hi
Any luck with the W140?

 

[LostKiwi]

Tried mercedesreplacementkeys of Birmingham. They replied that they can't do the W140. At most they could repair a faulty key. But they think that the IR jey must be ok as it works the central locking. So they don't believe they can help.
I'm trying to get to the R38 starter relay to force an engine start even when immobilised. Any advice on where this is?

https://www.benzworld.org/forums/w1...-module-location-s-class.html#/topics/1546871

 

[General patten]

Hi
Any luck with the W140?

P

Hi
Any luck with the W140?

have been working away last few weeks,sending my key off tomorrow to see if it can get repaired..fingers crossed

 

[General patten]

My car is working again now..WOOP WOOP

 

[General patten]

****** car has immobilised again....really getting on my tits now..I had the ir key fob checked out and that was all fine,so didn't need a new ir fob after all.....car battery went flat so charged up re connected and opened car wit key,went to start and she started first time..locked the car with ir remote that also worked....so I ran to the wife and said its stated again WOOP WOOP lol.was dousing washing up and noticed the indicators were flashing,went out to open car up the ir remote fob wouldn't open door so I used the key.went to start no joy red and green lights flashing again on interior mirror "now immobilised again".........

 

[brianbrian]

It could be the ignition switch?