Join Date: Mar 2014
Location: France - down by the Spanish border
Vehicle: 2014 SLK250
Other Toys: RS3, MacanS, MGBV8
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What is their claimed 'seriously improved power delivery'? How is it done? Have they published independently verified figures?
I ask because I have never heard of this [I presume] chip. Not that means very much as there are so many. There are cheaper chips from better known names such as Racechips, but honestly most of it is snake oil. All they do is remap a few things that Mercedes have held back for comfort.
But let's go back - what do you want from the 250? These aftermarket chips claim maybe up to a 20hp increase. In reality this might be 10hp. Are you sufficiently aware of what a 10hp increase would feel like? I along with most others would not recognise it on a 250 because the car it is pretty nippy already. (Unfortunately it is going to be short lived with the extra nippiness in the 2016 line-up!)
Choice is yours of course. You will certainly get a re-map, but you are not going to be magically elevated up to V8 performance, you might get a change in fuel consumption and maybe, possibly, a noticeable change for the worse at low revs. If you are going to go ahead, have the car dyno'd before and after and let us know the changes as it is very easy for us (there is loads on this subject in the archives) to cynically say snake oil without being fully conversant with what is going on.
If you are intent in squeezing a bit more out of the engine, try looking at Kleeman. They do one or two things for the 250 and have a proven record and reputation. Unfortunately more than €600..!