New non running 95 CL500 project car bought sight unseen - Mercedes-Benz Forum
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post #1 of 40 (permalink) Old 05-19-2019, 01:54 AM Thread Starter
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Date registered: Mar 2010
Vehicle: 2007 E220CDI, 1990 300E-24V, 1987 W124 3.6 AMG build 1993 E500 W124, 94 320CE, 1997 W140 S280
Location: Northern Ireland
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Non running CL500 project car!

Hi all and welcome to this thread!

I have nearly a dozen classic Mercedes 124 and 140 models collected over the years which I restore and repair myself. I have a genuine original Star setup and all of the appropriate tools to repair the cars as DIY. My latest project is a 1995 C140 CL500 Coupe – 73k miles and full service history + MOT’s to back it up. Caveat is that this poor girl has not started up for 4 years+ So i bought it as a “trade sale” no returns – sight unseen from another country. Oops . In my defence it was a very decent price – these CL500 140 coupes command strong values over here and this one was priced just decently enough that it sparked my interest even being dead essentially. I think ill save a few K overall and have a very nice example if all goes to plan.

This is only to start generating the thoughts of the forum – as to how I tackle this when the car reaches me. It has to be collected by lorry, taken to ferry in England and over to N Ireland to my home. I am told I will have the car Friday next week or Saturday at latest. So about 5 days out let’s say – a few semi sleepless nights still ahead!

The seller is a car dealer and to be honest he sounded genuine enough describing the car. He has owned it for 4 years himself and decided to move it on now due to having to fork out labour rates to diagnose since he can’t work at it himself. Here is what he told me about the car in summary:
  • Past owner had it 10 years. It was garaged the whole time and they were selling the property snd at this stage it’s battery was flat. They got the AA out and the car would not jump start at all – so they ended up selling it on as it was due to having to move home. And this dealer had bought it - he may well have knew these people I'm not sure (It did not see a garage at this point – only the AA)
  • This dealer bought the car for himself as a project and after a few months entrusted it to a local mechanic to take it on and get it running.
  • This mechanic diagnosed initially the eco wiring. So the engine loom (I presume upper only... not sure) was sent to Poland and pro re-wired. The mechanic installed that and no difference. Cost £800
  • Then the ETA was suspect ECO. So it was removed and sent for rebuilding in UK – for £170. No difference.
  • 8 replacement Fuel injectors were obtained also – possibly fitted too not entirely sure but 8x new fuel injectors are involved somewhere for sure. Either they will be already installed in the motor or laying in the trunk.....
  • Then he said it needed a new starter motor because it sounded “too slow”. New starter fitted to the car – cost £380. Then he said oh- the battery is dead too – we need one of them.
  • At this stage the dealer started to ask simple things like – “did you drain the fuel tank and check filters etc?”. Mechanic said he had not done that yet – and the dealer realised he was less than ideal to be working at it and basically had no ability to repair these era Mercedes.

So it was taken back to the dealer’s private lot and stayed there with other projects – and sat for a total of 4 years. He realised he had too mmay projects and would not be likely to get this car sorted any time soon. Very recently he had the car sent for pro repaint / rust repair of both front fenders and he offered the car for trade sale “as is” basis. Still not a peep to start up.
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Last edited by JC220; 05-19-2019 at 11:45 AM.
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post #2 of 40 (permalink) Old 05-19-2019, 01:56 AM Thread Starter
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Date registered: Mar 2010
Vehicle: 2007 E220CDI, 1990 300E-24V, 1987 W124 3.6 AMG build 1993 E500 W124, 94 320CE, 1997 W140 S280
Location: Northern Ireland
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NOW – I am paraphrasing here. Joining up and summarising tit bits of info I was given and receipts emailed to me. Do I take all this info as gospel? NO he is a dealer so won't let the truth get in the way of a good story. But I can only consider what he has told me in good faith.

I will not know the full extent of what the mechanic disturbed or worked at for myself until the car gets here. Hopefully they did not mess with much as that will add work for me.

What I am wondering is what would cause a m119.970 to go stone dead overnight? I want to be ready and hit the car hard as soon as it gets here so to speak. My plan of attack is:
  • Drain old petrol. Drop tank strainer and check condition. Fit new fuel filter. Re-fill with 4 – 6 gallon fresh super unleaded.
  • Install all new fuses and clean the contacts – including the base module.
  • Install new battery
  • Clean battery terminals and check smaller + wire to base modules for tightness
  • Hook up fuel pressure test gauge
  • Fit a injector noid test lamp
  • Crank it over and see for myself how the car is behaving.
  • Check with a timing lamp for spark at the plug lead(s)
  • Does this sound logical – any additional steps I should do?

I am wondering if the fault might be:

Dead EZL or other module– due to AA jump start
Failing diodes in LH module - non running fuel pump
Failed fuel pump relay or FPR
Bad crank sensor
Distributer cap, insulator, moisture or other ignition system failure
It has IR remote - possible problem with immobiliser or other electrical gremlin

I will use instinct and experience on my 500E m119 to listen for the ETA powering up, fuel pump running and check for spark etc etc. I have a wealth of good used and tested M119 spares, ETAs (w140 cable), modules, MAF etc on the shelf and I could borrow the dist caps and coils off my 500E just to test. I am tempted to buy a new spare crank sensor and have it on hand. A new 920 Amp 019 Battery is already on order for when the car arrives.

I took a gamble on this car going by the photos and the history that backs up the low miles. I will not know exactly what I've bought or exactly what the non start symptoms are until it arrives and I see for myself. If I am very fortunate it will be something simple like the fuel pump not running - or it could be an electrical gremlin that will take days or weeks to trace. I am fully aware of all of that so let's think positive here for the moment!
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post #3 of 40 (permalink) Old 05-19-2019, 04:27 AM
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There is no substitute for low mileage.
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Previous: '92 600SEL, '98 S420, '96 S280 x2
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post #4 of 40 (permalink) Old 05-19-2019, 05:00 AM
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You've touched on all the right things to check. I'd check base module fuses first, listen for the fuel pump to run a few seconds when you first turn the key to on, then run scans of the engine related modules. Since the immobilizer function only affects the starter on 95's, as long as the starter functions, you can look elsewhere.
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post #5 of 40 (permalink) Old 05-19-2019, 06:13 AM Thread Starter
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Date registered: Mar 2010
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Quote:
Originally Posted by jal1224 View Post
Since the immobilizer function only affects the starter on 95's, as long as the starter functions, you can look elsewhere.
That is very good to know - thanks for that. I have not seen the key fob - but I presume it will be the single button flip blade type. I believe it is spinning over on the starter motor AOK but not firing up.
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post #6 of 40 (permalink) Old 05-19-2019, 07:12 AM Thread Starter
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Here are some photos of the beast in question. (I had 70 ish photos in all from the seller)
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post #7 of 40 (permalink) Old 05-19-2019, 07:22 AM
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Quote:
Originally Posted by JC220 View Post
That is very good to know - thanks for that. I have not seen the key fob - but I presume it will be the single button flip blade type. I believe it is spinning over on the starter motor AOK but not firing up.
You might also check for an aftermarket immobilizer system. Those can really screw things up.
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post #8 of 40 (permalink) Old 05-19-2019, 08:49 AM
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Swap out the four wire temperature sensor on the intake with another car.

I assume you pressed the shrader valve on the fuel rail, and the fuel sprays out not dribbles out..

Martin
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post #9 of 40 (permalink) Old 05-19-2019, 08:51 AM Thread Starter
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Date registered: Mar 2010
Vehicle: 2007 E220CDI, 1990 300E-24V, 1987 W124 3.6 AMG build 1993 E500 W124, 94 320CE, 1997 W140 S280
Location: Northern Ireland
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Quote:
Originally Posted by MAVA View Post
Swap out the four wire temperature sensor on the intake with another car.

I assume you pressed the shrader valve on the fuel rail, and the fuel sprays out not dribbles out..

Martin
I have not viewed or taken delivery yet Martin. I will get the car next weekend so about 5-6 days out still. Then I will jump on it and start providing more informaiton on exactly what it's symtoms are. I have all test equipment - Star, fuel gauges etc at my disposal so hopefully it won't be too hard to pinpoint if it's ignition or fuel etc on the first day it arrives.

I have a 1992 500E which I could borrow parts from as a test only but also lots of m119 spares on the shelf including a w140 5.0 LH module
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post #10 of 40 (permalink) Old 05-19-2019, 08:57 AM
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AN d last but not least, install a new fuel pressure regulator. They are relatively inexpensive. Solved my problem on a '97 CL600
Anziani
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