Up to very recently here in Ireland, BMW were either doing engine replacements, where the chain had actually destroyed the engine, to pre-emptive repairs, replacing the chain, tensioners and timing gears. The local BMW dealership, were working flat out doing warranty work on these N47 520 engines.Still many out there. An acquaintance of mine has a 520d which decided to pack in on the motorway just before Christmas. Timing chain. N47 engine. £800 to fix and they got off lightly!
I can understand why dealer groups are investing so heavily in the used 'car supermarket' market, they must be sick and tired flying the flag for their marquees to spend so much time dealing with poor design and manufacturing problems and keep customers happy. I know a couple of master tech's for other brands and the time/funds they are allocated for the recall and warranty work rarely equals the time and effort actually taken, which then equates to issues from rushed jobs.Up to very recently here in Ireland, BMW were either doing engine replacements, where the chain had actually destroyed the engine, to pre-emptive repairs, replacing the chain, tensioners and timing gears. The local BMW dealership, were working flat out doing warranty work on these N47 520 engines.
If the servo is compromised then the emergency breaking will also be affected as it uses the same braking system. It just uses a different system to activate it (radar from the front grill rather than the drivers foot)Can anyone who is suitably knowledgeable advise how this failure, with the resulting loss of servo assistance, affects the operation of the automatic emergency braking (i.e collision avoidance/mitigation) systems? Will these experience reduced performance or will full braking still be achieved?
I can understand the brake servos being out of commission for one reason or another, but should not the manual function still be active? Albeit with a much harder effort required?If the servo is compromised then the emergency breaking will also be affected as it uses the same braking system. It just uses a different system to activate it (radar from the front grill rather than the drivers foot)
It will be, but it will feel like you’ve no brakes at all, standing on wood if you willI can understand the brake servos being out of commission for one reason or another, but should not the manual function still be active? Albeit with a much harder effort required?
Yes, I can imagine, especially with disc brakes,whatever about drum brakes .It will be, but it will feel like you’ve no brakes at all, standing on wood if you will
Trust me, stopping from 55 over approx 200m was hard enough!!It will be, but it will feel like you’ve no brakes at all, standing on wood if you will
I wouldn't be surprised. Most components are outsourced, arent they.I bet the vacuum pump is made by an OEM manufacturer and bought in by MB.
Now...BMW had a major recall on vacuum pumps on at least E60/E61 petrol 5 series. The same failure: the vacuum pumps failed, oil gets into the vacuum system and deteriorates the rubber diaphragm in the brake servo. The result is a loss of all braking assistance. In theory the brakes could be operated with additional pressure but in reality it was like having no brakes.
BMW managed to hush it up and the recall, was I think, only in the USA despite identical engines here in the UK. They also managed to restrict the recall to petrol engines - yet the exact same setup and failure was also seen in diesels.
I would hazard a guess MB use the same vacuum pump supplier.
Are they doing the same for UK? @LostKiwiI have no idea if this has anything to do with this issue but this was on news here today.
Mercedes-Benz tells 17,687 Australian owners to 'stop driving' immediately
Due to a problem with the brake booster, Mercedes-Benz is recalling a total of 17,687 vehicles and telling owners to stop driving.www.carexpert.com.au
Ian.
HI, I have a 2018 MB E220. I have a similar issue oil in the brake servo and a estimated cost of 6000 euro. I have had a lot of problems with this car i.e sensor and oil leaks. Any advise?
Not heard anything yet....Are they doing the same for UK? @LostKiwi
And I was thinking at least MB don't have inbuilt design problems like BMW's N47 timing chain's falling apartNot heard anything yet....