CL HELL: rattle and vibration

Rafy126

Member
Joined
Apr 26, 2007
Messages
24
Reaction score
0
Location
Aberdeen
Hi guys,

Been a while since i posted on here with my old SEC, now i've managed to get my hands on a W215 CL 500 (2000) with about 105k miles.

A month or two ago it started making a rattling noise and what i can only describe as a worn bearing/vibrating/moaning noise coming from the engine.
The noise gets faster the more revs i give, even in neutral/park!

Eventually my power steering emptyed itself as the pump (ABC) broke!
So i had it replaced along with the following components advised from the mechanic (independent but ex merc!).

ABC pump: 0024666001
Vibration pulley: 1120351400
Tensioner: 1122000970
Shocker: 1122000014
3 x sensors: 2115401717

BUT the noises are still there!!!!!:mad: The parts have been fitted as they are all shiney new ones!

I thought it might be gearbox but the oil level is spot on.

Any ideas of what it could be, it also hunts for revs a tiny amount when letting off the gas since it's been to the garage???
 

Alex Crow

Senior Member
Joined
Jul 9, 2009
Messages
10,677
Reaction score
47
Location
Super Suffolk
Your Mercedes
W169, W124, w202, W203, KTM 250 EXC, VW T25 camper and a Polo in a pear tree
the whine could well be the abc system. there is an accumulator in the hydraulic circuit used as a vibration damper, these are to prone to collapse and cause a whining which increases with engine rpm. if you sit inside holding the revs at 1,500 rpm it should be a clear noise, now operate the raise/lower switch a few times at 5 second intervals - if this significantly alters the noise i would change the accumulator. hth
 

television

Always remembered RIP
Joined
Mar 14, 2005
Messages
164,073
Reaction score
367
Age
89
Location
Daventry
Your Mercedes
2002 SL500, 216 CL500, all fully loaded
We have never had a complaint about this before.

109 and 140 are reservoirs but not for vibration
 

Alex Crow

Senior Member
Joined
Jul 9, 2009
Messages
10,677
Reaction score
47
Location
Super Suffolk
Your Mercedes
W169, W124, w202, W203, KTM 250 EXC, VW T25 camper and a Polo in a pear tree
the damper in question is mounted under the o/s of the car, about in line with the bell housing. we have seen this twice before, the first one we saw was diagnosed as having a noisy pump, but a new one made no difference! changing this accumulator/damper cured both. beware the parts department though - they have the wrong one listed as being the damper, wis has it listed correctly.

part number 410 is the damper http://www.detali.ru/cat/oem_mb2.as...GA=722.633&CT=F&cat=65N&SID=32&SGR=235&SGN=03

note part number 150 is described as going to the damper http://www.detali.ru/cat/oem_mb2.as...GA=722.633&CT=F&cat=65N&SID=32&SGR=290&SGN=04
 
Last edited:
OP
R

Rafy126

Member
Joined
Apr 26, 2007
Messages
24
Reaction score
0
Location
Aberdeen
  • Thread Starter
  • Thread starter
  • #5
ok, that sounds exactly like what it may be.

I shall test it when i get the chance, but in the mean time is it safe to drive?

If this damper fails will it still run ok with a noise or will it start effecting bigger things?

I'll keep you updated, thanks.
 
OP
R

Rafy126

Member
Joined
Apr 26, 2007
Messages
24
Reaction score
0
Location
Aberdeen
  • Thread Starter
  • Thread starter
  • #6
i've just done the test sitting inside the car holding it at a constant 1500 rpm, with the raising & lowering at 5 second intervals, the noise was constant all the time, apart from at the end of the raising sequence there was a little rattle!?!

I also noticed after the car started and warmed up and the idle calmed down, the rattle got a little louder and heard a fast ticking noise coming from back of engine passenger side. (spark shorting out? Injectors?) :confused:
 
OP
R

Rafy126

Member
Joined
Apr 26, 2007
Messages
24
Reaction score
0
Location
Aberdeen
  • Thread Starter
  • Thread starter
  • #7
Hey punks!

Had a merc mechanic all over my car about this bloomin rattle noise, he said he used a smaller merc belt which misses out a pulley of your choice to see if any pulleys are causing the problem, turns out to be A/C pump is causing rattle, he said over £1000 for the pump alone!

I told him to C#@%&$% and he said he could just fit a smaller belt to avoid turning the A/C pump all together! About £40, and is a common thing!

I never use A/C as it's allways to cold for me anyway!

Cheers
 

Avantgarde Automotive, Mercedes-Benz and SLR McLaren specialists. Service, repairs, diagnosis and motorsport preparation.
Unit 14 Hither Green Trading Estate, Clevedon, Somerset, BS21 6XU Tel: 01275 217270 Email:steve@avantgarde-automotive.co.uk
www.avantgarde-automotive.co.uk
Top Bottom