MB (as with all manufacturers) have to comply with strict emmission laws and compromise between power/emmission outputs and tune their engines accordingly.
These tuning boxes basically allow more fuel to be delivered into the cylinders giving more power but probably increasing the particulate emmissions..(black smoke)
I'm normally quite skeptical, (Im a techie so I hear world changing electronics crap every day) but, its well known that chipping CDI engines give a substantial performance improvement and reputable firms do kits that add the kind of numbers quoted.
The Merc CDI engines are detuned for emissions and MPG so it is quite possible to add considerable performance with a software tweak. I know its ebay, but they do claim to offer a no quibble money back guarantee which would give you time to test it out. Judging by their feedback (including accolades from a guy who put one in an E220CDI) they are reputable and have been around for a while.
I suspect it will work, but what it does long term to your engine is another matter, and it may not pass an MOT emissions check- but then you just unplug it I guess.
If you decide to go for it, let us know the results.
JBerks,
..........I am sure that they add some extra power in certain ranges.
You state that the CDI engines are Detuned for Emissions and MPG and
longlife.
So if you tune it up for more power, and emisions go up, How does the MPG
go down as they claim.
Some people advertise their cars as 'chipped' or 'tuned' to a certain BHP
mostly without proof.
Surely a lot of people would be turned off by this type of advertisment,
as it may suggest that the owner had driven the car like mad, not to mention
what the 'tuning's affect may have on the longativity of the engine.
For instance older BMW inline sixes are more highly tuned than MBs sixes
but do not last near as long before a rebuild.
In my opinion if you want more power without risk, buy a car with a bigger engine.
Pascal,
I agree with you. All things are a compromise. The engine tuning is set to the level Merc think is acceptable from an emisisions, economy and reliability perspective, though we have to accept,at the expense of performance. There is a 1.9 skoda that will give the GTIs a kicking, but I doubt you'll see 120k without some serious maintenance work and the MPG is probably nothing to write home about. Surely these are the things you buy a diesel for in the first place?
Personally I wouldn't buy a chipped car, then again, I wouldn't buy a merc with any mods. Wider tyres and lowered suspension may give better handling but it stuffs up the ride, increases noise and increases stress and wear on the suspension components. A body kit on a saloon or even that SL style grill on an E says to me the owner sees themselves as a sports car owner and it has probably been mistreated. If its even slightly different from standard factory spec I walk away.
I do think that to say that the add is untrue is pushing it however, Clearly the figures they give are 'best' and they don't mention the downsides (as I said, you'd probably need to remove it to pass an MOT) but,
I am saying that I believe such an power increase is realistic and I have seen a number of similar claims from sources I would trust. Just don't try to flog it to me afterwards!
It is feasible that they could improve slightly on MPG, if power is increased and you can use a lighter throttle and change up sooner, but in reality, it's doubtful you'd see any improvement.
I do agree that the best way to improve performance of a C220 is to get a C270! Then again I have seen reports of chipping a 270 to match the 320! Each to their own I guess.
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