Mercedes C-Class W205 C300d Diesel Chip Tuning Box

Release the true power, economy and driveability of your Mercedes - safely, easily and in minutes with a CHIP Express™ plug-in upgrade!


More Power

Power Before
180 kW / 242 bhp
Power After
202 kW / 271 bhp
Power Max
223 kW / 299 bhp

More Torque

Torque Before
384 lbf/ft
Torque After
424 lbf/ft
Torque Max
488 lbf/ft

After figures show the power your vehicle will produce on the supplied settings. Max figures show the power your vehicle could produce on a higher setting. More Information


Gallery

Diesel Tuning Chip
Diesel Tuning Kit
Diesel Tuning Chip in Hand
Diesel Tuning Video

The only tuning kit that comes with everything you need:

  • The chip (can be re-programmed if you change vehicle)
  • Engine specific photo instructions
  • A plug-in cable harness for your engine
  • A quick release Velcro chip mounting pouch
  • Reusable Velcro cable ties
  • A blanking plug to revert to stock easily

If you’re not delighted simply return goods postmarked within 28 days for a 100% refund.

Order Today

Mercedes C-Class W205 C300d

  • Power: 245 PS / 180 kW / 242 bhp
  • Torque: 520 Nm / 384 lbf/ft
  • Option: 2.0L / From 2018
  • Availability: Available for Shipment Today

Rating:
★★★★★ 5.0 (11 reviews)

Price: £545 £445 $567 USD Estimate More Info

Choose Warranty: Why Extend?

  • Traceless once removed
  • 28 Day Money Back Guarantee

Why choose CHIP Express™?

Royal Mail Global Shipping
Plug-in Non-Permament
Money Back Guarantee
DPF, EGR, EGT & ECU Safe
Auto & Sports Mode Compatible
Up to 5 Years Warranty

Achieve a guaranteed increase in performance from a name synonymous with digital diesel tuning systems – CHIP Express™.


Product Details

Unlike "generic" diesel tuning systems, this advanced, self fit chip will be programmed specifically to optimise your Mercedes C-Class W205 C300d. And because it works in conjunction with your on-board computer rather than altering it, all engine safety functions remain operational. What's more, the system can be easily unplugged, leaving no trace of fitment, returning your vehicle to factory standard at any time.

The CHIP Express™ system simply plugs in using connectors which are identical to those originally fitted by the manufacturer - there are no wires to cut, just follow the supplied photo-instructions for your specific engine and you'll have the job done in minutes. Once installed, you will immediately feel the transformation. You'll pull away with ease, climb hills effortlessly and enjoy extra reserves of power when you need them. Your whole driving experience will be enhanced thanks to the significant boosts in performance. You'll feel the improved acceleration, the cleaner, crisper throttle response and enjoy smoother gear changes – turbo lag and hesitation off the mark will be replaced by a faster, more linear and instantaneous delivery of performance; you'll also appreciate a reduction in engine noise. Improvements in torque will transform low end dynamics and allow you to keep RPM's down by holding taller gears while using less throttle for similar speeds, helping you save fuel. Remember while most tuning companies aim to provide maximum power our aim is to also refine drivability and in gear flexibility, providing a wider spread of usable performance where you need it most!

Better Economy

By making your engine significantly more fuel-efficient, the CHIP Express™ digital tuning system means you can achieve substantially better economy from your W205 C300d too. You'll drive on a smaller throttle opening for a given speed and change gear less, getting you further on a tank of diesel!

Before
After
 
 

* Typical economy results between 8-16% yet can produce up to 20% depending on engine tolerances, driving style and conditions. CHIP Express™ diesel tuning chips may also increase the maximum speed of your vehicle by up to 5%; applies to non speed limited vehicles only.

Ever wondered why the manufacturer didn't program it this way as standard?

Vehicle manufacturers are forced to compromise when they set up the engine's ECU, to create vehicles which will operate in a wide variety of markets and conditions.

  • Many countries, for example, impose emission controls which are far more rigorous than those we have in the UK.
  • Other countries relate their vehicle taxation systems to power output rather than engine size.
  • Some, like the UK, impose higher taxation for different emission levels.
  • In many cases power is deliberately restricted for future use.
  • Finally the manufacturers themselves often produce several different performance variants of a given model.

To meet all these different needs, they re-program the vehicle's ECU to change the engine requirements. Now, thanks to CHIP Express™ class-leading, state of the art solutions, you can benefit from greater low-down torque for improved pulling power, higher output for better out-and-out performance, and better fuel economy!

Feedback From Our Customers

Charlie from Eastleigh with a Mercedes W205 C220 CDI BlueTEC 170 said: The "Chip" is everything you say.... my MPG coming back from Gatwick was up to 67 MPG.... due in part to the speed restrictions.... but never the less, its at least 5-8 MPG greater than before! The car also changes gear more readily as well, I have not had the opportunity to fully exercise the increase in torque yet, but I don't expect it to disappoint!
Steve from Salisbury with a Mercedes W204 C220 CDI Blue Efficiency 170 said: Originally bought this tuning kit for my Mercedes ML280. The difference in torque, acceleration, smoothness and driveability was excellent and immediate. I sold the ML and Bought C220 Blue Efficiency, the same kit that I used for the ML280 was returned to CHIP Express for reprogramming to the C220. It took 48hrs from returning to receiving the replacement and less than 10 minutes to fit, the car has been transformed into the car it should always have been! Excellent service (rare these days), I highly recommend this product!
Richard from Kineton with a Mercedes W204 C250 CDI Blue Efficiency 204 said: Just a short note to say thank you. Your customer service is like an oasis in a sea of mediocrity. Nothing is to much trouble - I cannot commend your company highly enough. I have now had one of these chip's well over 5 years on 2 different vehicles. The results on both were great. I initially bought the box for economy but the side effects of smoother delivery of power and more of it were a welcome bonus. I have recommended to friends and colleagues who have bought them too!
Kaj from Waterlooville with a Mercedes W204 C200 CDI 136 said: I received the chip tuning box next day by special delivery. Opened it up and had a close look then took some time to read the instruction manual before fitting. I did not change the settings on the box, just kept them standard. Left the engine on idle for few minutes and checked for any error messages or lights on the dash, there were none. Car was idling as normal and I could feel the engine running smooth. Switched it off and finished the installation. I could not wait to jump in the car and test drive it! Well, first impressions are great; the car felt very different with a lot more power, acceleration is fantastic. I drove a good 20 miles. Felt like I had a lot more power in low gears as well as high gears and I didn’t have to press on the accelerator to much. The 60 mile journey to work this morning felt so much better. I was hardly touching the pedal at 70mph and the trip computer gave a reading of 55mpg compared to 47mpg average. I will be recommending you to my friends.
Chris from Rugby with a Mercedes W204 C220 CDI Blue Efficiency 170 said: I fitted this little box of tricks and to be honest I am one of the world’s most sceptical when it come to bold claims, also I am no mechanic, in fact the most I ever do is top up the oil, water and tyres. Fitting the unit was so easy even I could do it, instructions so clear you can’t go wrong. My first impressions of what this chip unit is doing is amazing, most of all is the increase in fuel economy, its early days but it looks like a 15% improvement, the power output has also increased by a good margin making the car much more fun to drive.
Les from Durham City with a Mercedes W204 C250 CDI 204 said: Mercedes C250 Estate (S204) AMG 2014. Fitted the chip to the car a few days ago and in terms of power and torque... WOW!... what a difference! The car has a new lease of life (even though it is only 2 years old). The torque increase is obvious - the car now picks up speed much more smoothly and evenly in both economy and sport mode. As for acceration in sport mode, its bordering on scary when I give it its freedom with my right foot... 50mph to 70mph was achieved in seconds, and I reckon if I fit it with wings it might just take off! Even my other half noticed the difference - and she's no petrol head. Lets hope the fuel consumption increase is equally spectacular - if I can keep my right foot off the gas! FOLLOW UP: I had a chance to take it for a run over the weekend... MPG up to 60.1 MPG on the same route in the same traffic conditions and I used to get 46 MPG on if I was lucky.
Ashley from Dumfries with a Mercedes W204 C220 CDI 170 said: I can't tell you just how very thrilled I am with your product which I fitted with no difficulty whatsoever, a few days ago. The car has been totally transformed! All the claims made in your advertising have been met, and, in my mind, superseded. Additionally, to come across a company with such high standards of customer service, is refreshing to say the least. Well done for producing a product that has such an ability to greatly increase our enjoyment of our vehicles performance, with the added benefit of improved fuel economy as well. I shall definitely be recommending CHIP Express to all my friends.
Peter from Bangkok, Thailand with a Mercedes W205 C220d 194 said: Many thanks for your prompt delivery all the way to Bangkok for my brand new W205 C220d. The Merc was somewhat fast with 194PS and 400Nm but after installation I am now a very happy camper, the car is now so much fun to drive and the throttle response is just amazing! You have made my year!
Lee from Bromborough with a Mercedes W204 C220 CDI 170 said: Recently bought the chip for Merc C220, super impressed! Drove down to London this weekend at 67MPG, no lag, improved performance - exceptionally pleased. A great product that's paying for its self already!
Robert from Brierley Hill with a Mercedes W204 C200 CDI 136 said: I can not believe the change in my car with this chip. Power is just unreal to the standard setup on my C200. Mercedes need to improve the programming on there cars. This diesel chip is well worth the money paid.
Steve from Southampton with a Mercedes W203 C200 CDI 122 said: First surprise: Having ordered my unit around 4pm on Friday afternoon, I was most surprised and very pleased to receive it first thing on Saturday morning. Second surprise: Ease of fitting. Third Surprise: The overall difference it has made to the car. I own a Mercedes C200 CDI and have always felt that Mercedes got it wrong with this model; however I bought it and am stuck with for the foreseeable future. Your unit has turned it into what it should be, it is now smoother, quieter, responds better and the difference in fuel economy is nothing short of outstanding. Today on a regular trip from Southampton to North London and back I saw the mpg raise from 42.1mpg (average) to 51.2mpg (overall average for the round trip) and apart from road works (M3 & M25) and typical M25 hold ups, I was driving at normal motorway speed (outside lane with flow of traffic).I was that impressed I even stopped in the services on the way back and took a photo of the trip computer display. It was showing the following: From Start 152ml / Av speed 45mph/ 51.0mpg!

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What others are saying...

“A friend recommended one of your "gadgets" a year ago and being not-very-techno (but Scottish and keen to save money!) I bought one. The gizmo has TRANSFORMED the performance of my Land Rover Freelander 2 TD4 AND improved the fuel economy by a genuine 15%; so much so that I have bought another one for our Freelander 2 SD4 which is now a REAL Q-car! (And of course saves fuel...) I have never written a review before (though strangely I do read them and take notice of them, whilst half-believing that they are written by the owner's chums!) so to have made me pick up pen & paper so to speak - I MUST be delighted! Thanks for making technology so simple and so successful!”

★★★★★

Andrew from Lochwinnoch

Land Rover Freelander (2) SD4 190

“May I congratulate you on this diesel tuning product as it has made a noticeable difference to my Land Rover Discovery. I have tried other diesel tuning boxes for my previous vehicles (Kia Sorento, Peugeot 206 and Vauxhall Vectra)... and they all produced slight engine stuttering under certain load conditions. The CHIP Express system does not show any evidence of this and is equal to the likes of an ECU remap (which I have also had done before) for smoothness and noticeable power gains. This would be the only diesel tuning product I would recommend.”

★★★★★

James from Callington

Land Rover Discovery (3) 2.7 TDV6 190

“Be assured, this is NO gimmick. Arrived yesterday (less then 24 hours after the order was placed) and fitted today. The fitting was easy especially with the photos and instructions sent with the chip. The first thing I noticed was the responsiveness of the engine from a standing start, no more lag. I then went on a 30 minute drive both motorway and sideroads and my average fuel consumption went UP from 33.3mpg to 38.7mpg. My motorway speed varied from 60 to 85mph and the sideroads from zero to 40mph. I am so pleased with the whole result. This is worth every single penny paid. Thank you!”

★★★★★

Edwin from Bridgend

Ford Kuga MK2 2.0 TDCi 163

“I must say l'm delighted with the improvement from your chip, its on the standard settings and the difference in the car is amazing!!! I have a smile on my face every time I get in the car, and there is about 5-7mpg improvement. With the mileage l do, l can see myself getting my money back in no time at all. So if your a doubter like me, don't be because its one of the best things l've ever bought!!!”

★★★★★

Ian from Manchester

Audi A6 MK4 3.0 BiTDI 313

“Many thanks for your fantastic service! Unit ordered Sunday, delivered Tuesday am!! Unit now fitted and, as promised, the car is transformed. Winding country lanes tackled quite happily in fifth gear. Cruising on much smaller throttle openings and immediate response on acceleration. The car behaves as a mini car should behave. I had some initial doubts about spending quite a large amount of money on this item but it is worth every penny and would not hesitate to advise anyone to do similar.”

★★★★★

Alan from Coventry

Suzuki Swift 1.3 DDIS 75

“As do many, I took the 'if it sounds too good to be true, it probably is' approach to performance chips. But CHIP Express were recommended by an impeccable source who had had experience with their product on my model of car - a Citroën C6 with the 2.7 HDi twin turbo diesel. Following a first rate response to a query, the product has delivered in spades. Ten days and more than 1000 miles of mixed town, country, low and high speed driving later I am certainly getting more than 10% more from a gallon, and probably 15%, and the performance is markedly better. Low speed response is immediate and has eradicated what I took to be baked-in lag in a big automatic turbo diesel, and mid-range acceleration is silky smooth, including up inclines. A very good car has been turned into the excellent car I had hoped for all along.”

★★★★★

Simon from Ketteringham

Citroen C6 2.7 HDi 204