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  1. W

    Car runs better only during DPF regen

    I replaced the PCV with the newer version so now the seal for the PCV near the turbo inlet is brand new. I also removed and reinstalled and tightened up the turbo inlet seal and jubilee clip. I think I'm making progress, but it's hard to tell if it's just because it's more eager than before, so...
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    Car runs better only during DPF regen

    Might have made some progress with this: The PCV pipe seal near the turbo inlet seemed a bit loose, so I've pushed it in as much as possible and made sure the inlet batwing sits snugly on the turbo inlet. I've ordered a replacement PCV which will come with an upgraded seal as per this thread as...
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    OM642 PCV Upgrade

    I've ordered the upgraded one for £85 + VAT from Sandown Mercedes-Benz Poole
  4. W

    Car runs better only during DPF regen

    Still unresolved for me
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    Car runs better only during DPF regen

    The mounts were done by Colin's team at MBS Southampton - doesn't detail the parts used on the invoice but the gearbox mount cost £34.30 and each engine mount was £116 ex VAT and labour, back in 2018, so I would asssume they are Genuine Merc or OEM. Gearbox oil was changed a little after the...
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    Car runs better only during DPF regen

    Thanks all, I had the engine and gearbox mounts changed in 2018 ~20,000 miles ago so I was working on the assumption they are still good, plus the engine can run smoothly (during regen). That's why I was focusing elsewhere but I could get them checked/replaced for good measure.
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    Car runs better only during DPF regen

    So I've driven some miles since and had a couple of regen cycles in that time. Firstly the good news is the temperature is rock-solid stable and possibly due to carefully reseating and tightening up the air intake charge pipe and 'batwing' it feels more responsive than before at all...
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    Car runs better only during DPF regen

    I've replaced the thermostat. What could have been a really easy job took awhile due to poor access to remove the lower bolt on my version of the engine. I ended up having to remove the air intake housing, shroud at the front if the engine, loosen the housing the charge pipe goes to, remove the...
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    Car runs better only during DPF regen

    I've ordered a replacement coolant thermostat from MB in Poole and will collect it, install at the weekend and report back hopefully.
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    Car runs better only during DPF regen

    Interestingly I have noticed the coolant temperature sits around 80c unless in stationary traffic or being driven a little harder, in which case it sits at just a smidge under 90c. Regarding the DPF/injectors, I was thinking possibly a trip to M&B Fuels in southampton could test both, but...
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    Car runs better only during DPF regen

    Hi all, 2010 S350 Bluetec OM642 W221, 54,000 miles A bit of a head-scratcher this one: the engine runs better - it's quieter, smoother and more responsive - only when it's doing an active DPF regeneration, before and after it's a bit rough, sluggish and clattery. Does anyone have any idea why...
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    W221 Euro5 or Euro6

    I had the same issue on my 2010 S350 Bluetec - in my case the paperwork with the car came with a certificate of conformity / homologation (mostly in german) confirming the Euro6 emissions status - TFL accepted that along with the V5C as proof and updated their system.
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    W221 steering wheel wobble/shimmer/shake

    A nearside track rod end and offside torque/thrust control arm were replaced at the last MOT due to torn boots on the ball joints, after which another full alignment was carried out. At this point the car tracks straight and true and the steering wheel shimmer is gone completely. I cannot be...
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    W221 steering wheel wobble/shimmer/shake

    Yes, that's what I'm trying to eliminate as a possible cause. I also wonder if it's more prone with the larger AMG calipers that come with the AMG sports package cars.
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    W221 steering wheel wobble/shimmer/shake

    Hi Danny, I had the bushes on the arms in the bottom left and right of your picture replaced with the stiffer bushes from the 4matic cars. I also had the left and right arms in the top of your picture replaced entirely as there was some balljoint play. I've not touched the tie rods (middle of...
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    W221 steering wheel wobble/shimmer/shake

    @dannyfiveforty Nope I haven't found the root cause still. I'm doing a lot less motorway miles so it's fallen down my priority list. It's still there though exactly as I described on my 27th Dec 2018 post. I'm reluctant to throw more parts at it, I'd like to hook up a bunch of sensors to the...
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    W221 steering wheel wobble/shimmer/shake

    So I'm adding to my list of possible causes Excessive positive caster AirMatic strut height differences (apparently these can be adjusted in Star) Steer Axle Wheel Shimmy - Common Steering Problems - Hydrosteer
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    W221 steering wheel wobble/shimmer/shake

    This seems to describe similar symptoms on a flat smooth road, 70mph odd. The E46 has a different suspension setup to the W221 but interesting nonetheless.
  19. W

    W221 steering wheel wobble/shimmer/shake

    The arms (variously called camber control arms/track control arms/the ones to which the suspension strut attaches) were changed on both sides and it whilst it has improved the low-speed feel of the car (it feels more 'solid' subjectively) it has not eliminated the last of the steering wheel...
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    W221 steering wheel wobble/shimmer/shake

    To update everyone, as you can see in the last graph I posted, the amplitude of the vibration reduced following the wheel bearings change, I followed that up with a road force balance (at apparently the only place in Dorset that has the equipment - I thought it would be standard at a main...
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