C220cdi electrics

[Zululander]

PLEASE HELP
Recently bought a C220cdi. Have run it for about a week and tonight the alarm set itself off. I was unable to remote unlock/lock or start the car. I resorted in disconnecting the battery only to find the alarm back up still on. After a few attempts, I've managed to switch the inside sensor off. Reconnected the battery and alarm is now off but I still can not use the remote or start the car.

 

[television]

As there are many versions please give first 3 numbers of car ID 202/ 203

Malcolm

 

[Zululander]

Hi;
Thanks for your reply the Id is WDB 203
I don't know if i mention but the alarm back up has not stopped. I've also disconnected the battery overnight in case upseting the neighbourhood.

 

[television]

do not know if you managed to fix your problems today, the whole thing could have reset itself when you put the battery back. your hand book tells you how to re sync the whole thing, if you are still stuck please Email or private message me you full car number

Malcolm

 

[Zululander]

Thanks Malcolm; email on the way.

 

[television]

From what I can find it would appear to be the SAM (signal acquistion and actuation module) when it goes down, locking goes, car will not start and battery goes flat because the data bus remains active.
It is hard on some faults to be exact and this is a hard one. I cant tell tou to go and buy this or that, for I could be way out or wrong.

MB have a modified module part num 027 545 45 32 modified front right SAM module

Malcolm

 

[Zululander]

Hello again;
Have counted my losses and taken the car to a Merc service dealer. After £174.49 later I still have the problem although an inspection was done and a0.79A drain was found but still unlocated.
Tests done: Star test; checked battery drain; removed front SAM and ECU; removed all fuses & relay; Removed SAM; removed phone control unit; removed alarm siren and found corrosion on wiring and siren, but drain still present when disconnected.
I'm loosing faith.

 

[television]

Sorry I could be of no more use, Some of these faults are a nightmare, If MB must have so many electronic boxes,many of them interlinked like the SAM and alarm all joined into a CAN bus, all data coded it might not have been a bad idea to have built in a self test. The avarage Car eng: cant cope with these systems, I started in electronics in 1950, many people dropped out with solid state, more went with digital technoligy. We are now left with no one coming into the electronic trade,just a few coarses at technical colleges.
The piece that hurts is that MB are quite happy with the situation that lets semi skilled people loose on your car, every hour they spend on your car is a nice little earner for them. In the end it can only get worse.

Malcolm

 

[Zululander]

Thanks again Malcolm, I'm now taking the car back to the dealer were it was purchase from. They told methey have someone to look at the problem. I'll keep you informed on his findings.

 

[Benz4Life]

Horn on Death Row

Greetings,

I have a MB 1995 C220 and my car horn is dying, almost dead. It
sounds like a duck on steriods. I got a new horn for Christmas, but
I can't seem to locate the factory horn under-the-hood. Can some
one PLEASE help? I spent hours looking, unscrewing things and peeking
to no avail. Please somebody HELP!!!

MT

 

[television]

Greetings,

I have a MB 1995 C220 and my car horn is dying, almost dead. It
sounds like a duck on steriods. I got a new horn for Christmas, but
I can't seem to locate the factory horn under-the-hood. Can some
one PLEASE help? I spent hours looking, unscrewing things and peeking
to no avail. Please somebody HELP!!!

MT

Why not get someone to press the horn while you stand in front of the car and listen or try and smell roast duck.

Malcolm

 

[tom7035]

Why not get someone to press the horn while you stand in front of the car and listen or try and smell roast duck.

Malcolm

I like it!

The horn units will be somewhere around the front of the radiator area.

 

[Zululander]

C220 CDI electics

Hi; Back again.
I had some news today on the battery drain. They have order a new ECU unit. Does this make sense? A drain on the unit that Mercedes could not pick up?

 

[television]

Hi; Back again.
I had some news today on the battery drain. They have order a new ECU unit. Does this make sense? A drain on the unit that Mercedes could not pick up?

In my field these are nightmare faults, everything interacts together, where CAN buses and DATA buses run a fault in any one can take the system down.
the worst thing is that all of the data has to be taken out of the faulty unit and transferred to the replacement. where nothing makes sense is that when a unit is faulty how the hell do you get the data out of it. I cant, and no one can. what I have to do is to feed in the basic data needed to get it up and running and program the system from there, the equipment for this cost an arm and leg, its life is short and becomes obsolescent after a few years. the last problem is getting hold of the basic data to feed in, most manufactuers do not give it out freely. Sorry to go on, I should have had a sweet shop selling toffee's
In answer to your questions looking at the data bank, any control unit could cause it and would have to be replaced.

malcolm

 

[Zululander]

Hi; More news. Control unit for the drivers seat faulty. Been told none in the country; Does anyone have a part number for this as I haven't had a car for the past week and need to try and solve this a little faster.
Thanks.

 

[television]

Hi; More news. Control unit for the drivers seat faulty. Been told none in the country; Does anyone have a part number for this as I haven't had a car for the past week and need to try and solve this a little faster.
Thanks.

MB will give you the part number.

Malcolm

 

[Benz4Life]

Horn Fuse Help!!!

Hello again,

once again I am having stuck horn problem. Can anyone possibly tell me where the Horn fuse is located in the 95 C220? Beep, blurp and fried duck fix one
thing in this car and everything else goes up in smoke! Was this model a Blooper for Mercedez or what?

I may ship my car to American Idol, they can use the talent...

 

[Zululander]

MB will give you the part number.

Malcolm

Hi Malcolm; Thank you and the rest of the forum for all your help. Car still not repaired and has now returned to the dealer and got my money back.
I've now bought another C220CDI from a mercedes main dealer. Will keep in touch.
R.V.

 

[piestore]

203 siren

HI
most common problem with 203 alarm is water in the siren it is located in the N/S/F wheel arch liner (good spot no water in there then). connection to a star machine is best to identify last alarm activation but if it is the siren it doesn't leave a record. For information the alarm siren is hard wired to rear SAM which also controls locking actuation so problem could be there.
good luck

 

[Zululander]

HI
most common problem with 203 alarm is water in the siren it is located in the N/S/F wheel arch liner (good spot no water in there then). connection to a star machine is best to identify last alarm activation but if it is the siren it doesn't leave a record. For information the alarm siren is hard wired to rear SAM which also controls locking actuation so problem could be there.
good luck

Thanks Piestore but I no longer own the car. I've return it after a week from date of purchase. Control unit for driver seat faulty* None avaiable in the country * Five days delay from Germany.
I've bought another C220 CDI from a main dealer.