Pedal Throttle Response Controller WAK-999 for Mercedes Benz Most Models, 9 Drive Modes EC Sport Racing Smart Electronic Accelerator Potent Booster

Installing was a PITA because of my car but the device itself is easy and intuitive and most important, immediate positive effect and fixed one of my main complaints about drivability for my car (GLA45). Evidently, stock my car has terrible throttle tip in--I was kinda blaming turbo lag but NO it was really just the throttle pedal mapping.Unit is small and easy to mount/see/use. Only meh is the bronze-ish surround as it doesn't match my car.I originally looked at more expensive brands but why pay more? Totally does what I expect and at a low setting (let's call it 33%) the gas pedal feels way more responsive and natural.Here's the modes:"Normal" levels 1-9 (i'm running highest level (9) and it just feels like I expect a powerful, normally aspirated car should, whereas formerly it felt like hey-we're-trying-to-save-you-gas-or-nanny-you-or-feathering-a-clutch-like-a-novice)Sport 1-9: even at level 1 you can tell it's more aggressiveRace 1-9: probably pretty radical--i didn't even try yetEco 1-9: saves gasStock: basically disables any effectLock (anti-theft measure): Disables throttle entirely and has 3 digit passcode to unlock

This product is great if you know what it does. It makes your throttle response much better to where it FEELS like you're going faster. It does NOT add power but the throttle response improvement is amazing. I've had this on 3 cars with no issues. Takes 5-7 mins to install.It has multiple modes to change the amount of throttle response you want to add, and does have a eco mode, all that give you total flexibility of how sensitive you want acceleration to be.Love it.

Wrong kind of addapter

I have bought multiple times from this same seller and they have yet to do me wrong in any way. I have bought this type of item(xtros) from this seller multiple times as well. The product is as described as always, it does what it is supposed to do, it's the cheapest one on Amazon, easy to use and easy installation. Thanks.

I installed precisely as instructed, including watching youtube videos. My check engine light came on as soon as I switched the car on. Does NOTHING for pedal response and the display shows random nonsensical characters that flash on and off.

Don't listen to all the blowhards who that think they know how this works. It is very simple but so much nonsense out there.If you have an electronic throttle, when you press your gas pedal, you may experience a lag between the moment you do and the reaction from the engine.Before electronic throttles, there was no discernable lag. This lag is often built in by the manufacturer to reduce stress on the engine and transmission and to improve fuel efficiency.On a sports car, there is simply no excuse for this. I have a 2019 camaro that has a 1/4 second lag. This device does two things.1. It reduces lag. Setting F1 9 almost completely eliminates lag making the car feel like it has a traditional throttle cable.F2 adds a scaler to your throttle input so the degree you press the pedal is amplified. I did not find this to be necessary or useful. It does ramp up the throttle input but that can make the car too aggressive. Lots of squealing wheels.On F1-9 setting my camaro now behaves like a camaro should. You can also dial own the opposite direction to make the throttle less sensitive in snow and ice.If you only do one mod, do this one.

Worked good for a couple months then just stopped mid trip and would only let my truck idle

It work’s amazing, I think this item has a misconception that it adds horsepower but all it is a throttle controller so you will off the line be faster but overall doesn’t gain any horsepower but you do gain great control of your drivability. This item is super easy to install there is no need to be mechanical inclined just being that everything is plug and play, there is different versions of this item but this one feels very high quality and the connectors as well, also note that where you are going to mount the controller that the piece you’re mounting it to is clean use rubbing alcohol because the adhesive will not mount correctly if there is any interior protection on that piece the controller will just fall off.