2007 W211 various faults

[PistN Broke]

I have been challenged to work out if my sisters E320 auto 125k miles is economical to repair

First off for many years the car has been carrying an intermittent esp fault that still remains undiagnosed, but when the fault kicks in no cruise control, power cycling whilst in motion with gearbox in neutral clears the error and no fault codes are logged

There is a massive vibration but I am pretty confident that is the engine mounts from what I have read, Euro car parts only list a front left and transmission mount how many should there be?

Fan Control Unit kicks in randomly and has killed the battery which was replaced before the fan was diagnosed new unit is £700 any ideas where a good second hand could be sourced?

Recently it has also been suffering from loss of power intermittently once again cured by a power cycle whilst in motion and logging no fault codes which my google hole has pointed me potentially to the EGR or MAF?

She had just changed the battery, glow plugs and had a suspension joint which im guessing was a front from what I've read so we are already £700 in the hole before I've actually managed to see the car so I think we are on a knife edge here?

 

[Wighty]

Lemforder do engine mounts which are OE quality , there isn’t a left and right , they are the same part . There is also a transmission mount . Autodoc via their app is quite well priced and worth looking at as well .

What area do you live in ? As far as MB specialists are located . Update your user details to show this .

An icarsoft code reader will show specific MB faults , or MB Star diagnostics at a specialist .

The intermittent power loss is limp mode , their will be fault codes logged . Possible inlet port motor/swirl flaps ?

The car is due a gearbox atf and filter change if it’s not had one since 37500k miles

 

[bigasotonuk]

Hi,
Regarding ESP issue, I would be inclined to think that the issue was a reluctor on the rear, could also explain limp mode/loss of power, how often does it do this? Is it more likely to happen when going round a bend? at a certain speed?
Had a rear reluctor ring issue on one of my cars, caused same issues though it only ever triggered limp mode once.
Just a thought when it started did it coincide with new tyres being fitted? check tyre sizes are correct specifically the profile of the tyres.
The fan I would look for the same pt no. part on ebay for a second hand item, or one of these breakers
https://www.prestigeallparts.co.uk/...E2ctVdKEWQoQvb9FGsFijJF2iXHgDAUEaAvVTEALw_wcB
https://www.dronsfields.com/
https://www.a1merccentre.co.uk/

As long as the car is in good general condition the issues you have stated I wouldn't even consider it being uneconomical to repair (IMO), for amongst other reasons better the devil you know.

 

[PistN Broke]

Thanks guys I live in MK but the car is at my workshop in buckingham but we are more geared up for Audi than merc so just sucking OBDII doesnt cut it then

Thanks for the shout on autodoc looks like theres some fans on there too and the gearbox/atf change I will try and find out if thats been done.

Inlet port motor and swirl flaps? Is this easy to check? Cheap to replace? Is that on Autodoc too?

Is the reluctor ring on the rear an easy visual/change or have i got to drop the driveshaft out?

Tyres match what the kwikfit site says for width and profile 245/40 18 on the front and 265/35 18 rear.

The ESP fault does seem to come up at low speed, It came straight on leaving the car park at work i did a rolling cycle and it didnt come on again until entering the shop car park but on the way back to work it navigated the car park and wasnt until i pulled up to our security gate that the fault came up again but I could see it being diferrential speed accross the rear but I don't think that is when the limp is happening it's more at cruise conditions I think but I haven't been able to replicate that yet

 

[Wighty]

Thanks guys I live in MK but the car is at my workshop in buckingham but we are more geared up for Audi than merc so just sucking OBDII doesnt cut it then

Thanks for the shout on autodoc looks like theres some fans on there too and the gearbox/atf change I will try and find out if thats been done.

Inlet port motor and swirl flaps? Is this easy to check? Cheap to replace? Is that on Autodoc too?

Is the reluctor ring on the rear an easy visual/change or have i got to drop the driveshaft out?

Tyres match what the kwikfit site says for width and profile 245/40 18 on the front and 265/35 18 rear.

The ESP fault does seem to come up at low speed, It came straight on leaving the car park at work i did a rolling cycle and it didnt come on again until entering the shop car park but on the way back to work it navigated the car park and wasnt until i pulled up to our security gate that the fault came up again but I could see it being diferrential speed accross the rear but I don't think that is when the limp is happening it's more at cruise conditions I think but I haven't been able to replicate that yet

The inlet port swirl flap thingy is a total guess , but is a common fault on this om642 engine . The orange seal at the front of the turbo on the black air intake batwing has a habit of leaking oil gunk onto the inlet port motor that sits below it . Or the inlet manifolds gum up and stop the swirl flap movement because of too many short journeys .

It really all comes down to fault codes with these cars , hence the MB Star diagnostics advice .

 

[PistN Broke]

Okay after suffering some voltage issues i managed to have the car sat for a few days with the battery stable, took it for a run and esp fault came up but no limp mode
using a snap on Solus the only codes present are in the ESP
4D41 check component n49 Steering angle sensor
C3266 (undocumented in the Solus)

I know this is only half my battle but anyone with star knowledge able to help?

 

[alexanderfoti]

4D41 check component n49 Steering angle sensor

I know this is only half my battle but anyone with star knowledge able to help?

This is likely the cause of your ESP fault. Faults with wheel speed sensors etc will also trigger ABS faults.

 

[sweeper]

I’ve had esp bad faults on two Mercedes vehicles, both times it was the brake light switch

 

[PistN Broke]

Well having done quite a few test runs i had a 200 mile epic doing laps of the M1 and finally got it into limp myself
P0717 so I'm guessing its conductor plate change, that moves the bill significantly north from the £250 for steering sensor, engine mounts, rear speed sensors & ring, and secondary battery.
Quoted £850 by a local specialist here and waiting for a quote from down south.
I did see a post about someone managing to clean a plate on an SLK can anyone confirm if its actually a reasonable fix?

 

[alexanderfoti]

Well having done quite a few test runs i had a 200 mile epic doing laps of the M1 and finally got it into limp myself
P0717 so I'm guessing its conductor plate change, that moves the bill significantly north from the £250 for steering sensor, engine mounts, rear speed sensors & ring, and secondary battery.
Quoted £850 by a local specialist here and waiting for a quote from down south.
I did see a post about someone managing to clean a plate on an SLK can anyone confirm if its actually a reasonable fix?

No, cleaning them never works, don't waste the time or the fluid.

 

[alexanderfoti]

btw: "£250 for steering sensor, engine mounts, rear speed sensors & ring, and secondary battery." Is exceptionally cheap for that amount of work. The ring is a pain in the arse and usually takes a few hours of cleaning the hub etc properly.

 

[PistN Broke]

btw: "£250 for steering sensor, engine mounts, rear speed sensors & ring, and secondary battery." Is exceptionally cheap for that amount of work. The ring is a pain in the arse and usually takes a few hours of cleaning the hub etc properly.

That is just parts and the labour of love
Its frustrating to have ODIS but we can't fork out for star too

 

[PistN Broke]

Okay here we go again, Engine mounts rear wheel speed sensors and rings and a whole steering coloumn unit from prestige allparts fitted I no longer get the abs/tpms fail however I get a different ebv/abs fault and now the power steering stops working too
It came into fault after activating cruise control, hard braking and going round a roundabout so I guess big change in rear wheel speed. Traction control kicked in and worked under heavy acceleration before any warnings came up.

Fault codes out of the ESP unit
C0575
C3266
I'm hoping that one of you kind people can tell me if it's the angle sensor being 360 out or something else?