1993 500SE Clonks & cutouts

z80

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Hello.

Am new here. Have inherited my late father's car, above, with 139K miles on the clock. Engine is in good condition, doesn't burn oil.

However, there's a couple of weird faults with it. Not sure if I should be posting these questions here but this seemed the best based forum. Please excuse me.

When the weather is cold & wet, when the engine is started in the morning from cold when I drive down the road the ASR light often comes on and the engine seems to cut out - but it doesn't and idles at a low 400rpm. The only way to get the car to move is to almost fully floor the accelerator and jerky progress can be made. When the iginition is turned on & off again it resets the problem but then it happens again a mile or so down the road. When the engine's warm the problem never happens. Cure is to leave the engine running for 20 minutes before driving away, first time every morning.

The second problem is a strange clonking sound from front nearside that comes up through the floor in the front passenger foot well. The local garage (not MB specialist) thought it was the shock absorber but when this was changed the problem is still there. It clonks every time the car goes over small bumps. On smooth roads it seems quiet though.

Any help from experts on what these might be will be greatly appreciated, or please could you direct me elsewhere for help.

Thank you.


Greg
 
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z80

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Anyone have any ideas about this please?

Greg
 

television

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2002 SL500, 216 CL500, all fully loaded
Is it a 126 or 140 put up the VIN first 6 number and I will take a look later in the day.

Malcolm
 

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i don't have much of an idea with mercs but i always found most clunks from suspension (if nothing is broken or visibly worn) to be things working loose so go round every nut and bolt on the suspension on that corner and just nip them all up with a bar to make sure it's all tight
 
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z80

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Is it a 126 or 140 put up the VIN first 6 number and I will take a look later in the day.

Malcolm

Malcolm,

Thank you for that. The first 6 numbers of the vin are:- 140050

Appreciate greatly anything you can find.

Best Regards,

Greg
 

eric242340

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500se

On these engines, the distrubutor caps are preone to condinsation and the rotor arms are prone to tracking. WD40 works well with cond problem but if the rotors are tracking - they have to be replaced. If you remove the rotor arms (three screws) look behind them, is there a dark line? if yes then they are tracking. Replace them.:roll:
 
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z80

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On these engines, the distrubutor caps are preone to condinsation and the rotor arms are prone to tracking. WD40 works well with cond problem but if the rotors are tracking - they have to be replaced. If you remove the rotor arms (three screws) look behind them, is there a dark line? if yes then they are tracking. Replace them.:roll:

Thanks,

I recall my father having this problem with the car before (about 4 years ago) & the whole distributor cap had to be changed. I'll check.

Thanks,

Greg
 
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z80

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Malcolm,

Thank you for that. The first 6 numbers of the vin are:- 140050

Appreciate greatly anything you can find.

Best Regards,

Greg

Hi Malcolm,

Do you have any news on the VIN number regarding the faults?

Thanks,


Simon
 
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z80

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Malcolm,

Thank you for that. The first 6 numbers of the vin are:- 140050

Appreciate greatly anything you can find.

Best Regards,

Greg


Malcolm,

Did you manage to look up any data on these problems please?

Thanks,

Greg
 

jibcl500

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CL500,ML55,SLK280
dizzy caps for your S class are £90 + vat each, you need two and the rotor arms wont be cheap either. If you want to part with it let me know.
jib
 

jibcl500

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the clonk noise you refer to could be a broken coil spring, or a broken anti roll tie rod, these are common failures on the front suspension, the other things to check are the exhaust system, there may be a rubber hanger missing or broken, grab the tail pipes (when cold) and shake it side to side to see if the clonk can be replicated.
If your local to cambs you can drop it over.

jib
 
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z80

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the clonk noise you refer to could be a broken coil spring, or a broken anti roll tie rod, these are common failures on the front suspension, the other things to check are the exhaust system, there may be a rubber hanger missing or broken, grab the tail pipes (when cold) and shake it side to side to see if the clonk can be replicated.
If your local to cambs you can drop it over.

jib

Thank you.

I'll try the checks you kindly suggested. Thanks.

I live near Bath. The car might need to go to a good home though.

Greg
 

iamamanc

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didn't these cars have a crawl-home' engine, gearbox protection system. So if a major fault occured it would automaticly switch to emergency (crawl-home mode)
I don't want to worry you but I'm sure I read something about this somewhere
 

GEORGEROV

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HI z80 , another possibility for your 'clonk' , after that mileage, would be the bottom ball joints.
 

jibcl500

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Your Mercedes
CL500,ML55,SLK280
yes they have a limp home mode. My CL500 did this when the battery was so low there wasnt enough voltage to the ECU's, traction control, abs etc, I had no throttle, it just pulls off in 2nd gear and cruises at 30. system cant cope with misfires, Ive seen several early CL and S with the distributors all giving the same fault due to car dealers power washing the engine bays. Simple fault to fix but Mercedes owners assume its something major and its going to cost a small fortune, well it will if you take it to mecedes.
Luckily I CL doesnt have the dizzy caps and the expensive ignition module £1000 MB is replaced with something that isnt prone to failure.

jib
 
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z80

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Thanks guys,

The local Merc dealer in Bath is having a look at the poor old girl tomorrow & let me know.

Best Regards,

Greg
 

wscheffer

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Yes, it sounds like the clunk is in your suspension. Have your mechanic check you ball joints with a pry bar along with other related components. If the distributor is tracking would it not do this all the time dry or wet? Excuse me if I am wrong but, it sounds as if the vehicle is only doing this when the engine is cold? And I would check into the cold start valve or anything related to cold starts i.e. choking, etc…
 
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