Mercedes Diesel Tuning Chips

The most innovative and effective Mercedes diesel tuning chips you can buy!

Choose the tuning system with proven technology and a worldwide reputation – the tuning system specifically designed and calibrated for your vehicle. A CHIP Express™ plug-in diesel tuning box will boost your Mercedes's engine power, whilst reducing your fuel consumption. Buy a diesel tuning chip that will safely transform your drive for the better!

Select your Mercedes model from the list below:

Feedback from our Mercedes customers:

  • Charlie from Eastleigh with a Mercedes C220 CDI BlueTEC W205 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!

  • David from Cambridge with a Mercedes C219 CLS320 CDI 224 said:

    I am on third chip from Chip Express. I had one on my Rover 75 2.0 CDTi 131, then my Mazda 6 2.2D 163 and now on my Mercedes CLS320 CDI 224. I tried chips from other companies but they were all been sent back. This is the only chip I have had were you can feel the difference in the way the car performs. My Rover 75 was so much faster it was like a different car, I covered about 80.000 miles on that one. I then moved over to the Mazda 6 and would says this was a quarter as quick again and my fuel was so much better, I covered 60.000 miles with no problems. I recently upgraded my chip for use on my Mercedes CLS. The V6 engine is much smoother and more responsive. I have been using your chips for a few years now, covering thousands of miles each month as a chauffeur, your chips make driving so much better. Keep up the good work!

  • Neil from Nedlands Australia with a Mercedes S320 CDI 235 and C220 CDI 170 said:

    I bought the chips for around town fuel savings. I have just fitted chips to my Mercedes S320 CDI, and C220 CDI, and the results are fantastic. Both vehicles are smoother, and have much more low end torque. They upshift sooner, and hold onto gears longer on inclines. We have reduced our fuel consumption by 10% around town, and by 5% on country runs. Many thanks for your prompt and efficient service, Western Australia is a long way from Hertfordshire!

  • Leigh from Taunton with a Mercedes E-Class W212 E250 CDI BlueTEC Facelift 204 said:

    I have a 2015 Mercedes E250 CDI Cabriolet and recently fitted the chip. It took minutes to fit the chip itself and a further few mins of fettling to find the best place to stow the item, all in all a very easy solution. I bought the chip for the extra performance, more torque than power, as opposed to economy gains, and it has delivered it in spades. I took my car out for spin prior to fitting then again on the same road post fitting and I could feel the difference instantly and everywhere. I highly recommend this product for the grin factor, the economy gains will come as a result of the chip which to me is just a bonus.

  • Benjamin from Midhurst with a Mercedes B180 CDI 109 said:

    I have just fitted one of your chips to the above vehicle, and I have to say that the improvement to both mid range performance and MPG has been amazing. Both my partner and I just cannot see why Mercedes do not run with these devices as standard. It makes a pretty gutless and dull car so much better. We did not, of course buy this car for its performance, my partner needed an automatic due to her bad knee, however both of us were surprised quite how dull it was to drive. I had known about these devices for some time but had not experienced them 1st hand. I have to say that it transforms the car into just what we want. Money well spent, thank you.

  • Steve from Salisbury with a Mercedes C220 CDI W204 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!

  • Michael from Woking with a Mercedes CLC200 CDI 122 said:

    I am very pleased with the diesel tuning chip, the car is much more responsive and my MPG is better too. I will recommend your products to my friends.

  • Richard from Kineton with a Mercedes C-Class 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!

  • Rod from Wickford with a Mercedes ML350 CDI 231 Blue Efficiency said:

    I purchased my chip unit in September 2009 primarily for the increase in torque it gives for towing our then new caravan. It was a revelation! Not only did it make for a safer more comfortable drive, the extra fuel economy is very handy when towing. Clearly, when not towing the difference in power and fuel economy is even more impressive. Initial acceleration has a much better response, crisper, sharper again making for a safer vehicle, particularly when exiting round a bouts in the busy periods of high traffic volumes. Powering on (there safe to do so) is remarkable, coupled with the huge difference in the mid range it makes for a true sporting experience. Such has been my experience over the last 5 years that I have had the chip re-programmed by CHIP Express, who I have to say have been really excellent and very efficient with the service, and with the new leads and instructions supplied I will be fitting to our 2011 ML350 Blue Efficiency very shortly. Whilst a more powerful V6 231 bhp CDI engine, I expect, relatively speaking, a similar transformation and experience. Thank you!

  • Jim from Ontario, Canada with a Mercedes X164 GL350 CDI BlueTEC 211 said:

    My compliments! I've just installed the Chip Express on my 2012 Mercedes GL 350 Bluetec. The chip is connected correctly and operation is obvious the first time you use the throttle. Thank you for creating such a terrific product, I am very impressed! I will certainly promote your product to everyone here in Canada.

  • David from Tenbury Wells with a Mercedes Vito 122 3.0 CDI 224 said:

    A few years ago I purchased a CHIP Express unit for my Vito 120, I recently had it transferred to my 2012 Vito 122 and it works perfectly, this new vehicle has a trip computer and I was very happy to find that even though I have loads of power for overtaking I can still achieve 30+ MPG when I'm not in a hurry!

  • John from Boldon with a Mercedes C219 CLS320 CDI 224 said:

    I have had the CHIP Express tuning chip fitted to my Merc CLS 320 CDI since 2009 and find it very good, power is increased for when needed and I achieve around 12% better fuel economy, spot on!

  • Kaj from Waterlooville with a Mercedes C200 CDI W204 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 C220 CDI W204 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.

  • Richard from Swindon with a Mercedes A-Class W176 A180 CDI Auto 109 said:

    Well done CHIP Express. This is my third unit and am more than satisfied with the results. My usual journey covers 60 miles and the car returns about 57 mpg, after fitting the chip it achieved 67 mpg. That together with much smoother acceleration had me wondering if it was the same car! I now look forward to my next trip, most impressive and many thanks.

  • Ashley from Dumfries with a Mercedes C220 CDI W204 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.

  • Mike from Fairfield, United States with a Mercedes ML350 CDI BlueTEC 211 said:

    Just wanted to let you know the chip arrived for my 2010 Mercedes ML350 diesel a couple of weeks ago. I installed it last week, and the results are exceptional! In particular, I had occasion to make a long highway drive two weeks ago (prior to the chip) I got 26.8 mpg on the trip of 900 miles, mostly on the cruise control at 75 mph. I installed the chip last week, and made the exact same drive, same highway, same weather, except at mostly 80 mph on the cruise control. I averaged 31.05 mpg on the second trip – an increase of over four miles per gallon, at a higher speed. I have also experienced a substantial improvement in acceleration, though I don’t have a baseline for comparison. At 73 years old, I don’t do much street racing any more… but, there was this guy with a Mitsubishi Eclipse the other day… Anyway, I just wanted to let you know the chip really did what it is supposed to do. Extremely impressive.

  • Andy from Norwich with a Mercedes E250 W212 CDI Blue Effieicency 204 said:

    Many thanks for your excellent and prompt service. Had bought a chip for my Vito 120 V6 which I found made a great family van into a fantastic powerful autobahn cruiser. Fuel returns were up by 4 to 5 mpg but with better proformance. Now had chip altered by yourselves to fit onto my E250 cabriolet. Very easy to install. Fuel returns about 7 mpg more after after fitting with an increase in power and pulling in gear rather than changing down. Will not hesitate to have chip altered for next car. A very happy client!

  • 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!

  • Rick from Macclesfield with a Mercedes E-Class E350 CDI 265 said:

    Thank you for an exemplary service and rapid turnaround. I have to say that the courtesy and quality of service I have experienced over the years should be an example to any company wanting to succeed in business. Many times I have been frustrated and hugely disappointed when addressing a company through their "Customer Service Department", usually, the bigger the company, the worse service you receive. Dealing with Chip Express is definitely a breath of fresh air!

  • John from Stoke-on-Trent with a Mercedes ML270 CDI Auto 163 said:

    We bought one of the units for our Mercedes ML about 4 years ago. It has made a noticeable difference to the performance - the car always seemed to under-perform for its size before it was fitted and this has improved it considerably, thank you.

  • Harold from Aberdeen, USA with a Mercedes / Sprinter USA / 3.0 CDI / V6 / US and CA Spec 191 said:

    We did a quarter mile speed test before installing the chip, the speed was 59.5 MPH in 23.1 seconds, the average MPG for highway driving was 14.2. We then installed the chip and did the same test, the quarter mile speed improved to 64MPH and the quarter mile time is now 21.9 seconds, MPG was up to 15.3 - remember this motorhome weighs about 12000 pounds so we figure the horse power increase is at least 40! We are impressed.

  • Robert from Brierley Hill with a Mercedes C200 CDI W204 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 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!

  • Richard from Washington USA with a Mercedes R320 3.0 CDI 215 said:

    I purchased an identical chip from you about 5 months ago after being less than impressed with my recent Mercedes R320 CDI performance. Well your chip made THE difference! I purchased a second R320 about 4 hours ago and am ordering a chip for that car before I even get the car next week! My brother-in-law also will be purchasing one from you in the near future! Thank you so much! FINALLY a device the delivers as promised.

  • Dennis from USA with a Mercedes ML320 BlueTEC 215 said:

    I just arrived back from a long trip... the results are simply amazing - far better than my best expectations. I got as high as 37 mpg on one segment of 250 miles on a four lane road and 36.7 on a 740 mile leg. Overall, I drove over 2500 miles and averaged 33.7 mpg which includes a lot or city driving. Driveability is unchanged or if anything, improved. Before, there was a turbo lag that was annoying at times. Thanks again for your help. Your device is superb.

  • Eden from Auckland NZ with a Mercedes X164 GL350 CDI 224 Blue Efficiency said:

    I can not believe the difference, I was going to get rid off my new 2010 Benz GL, once a slug... now its a weapon, its unreal!! I also have a new BMW M3 but now my Benz is my favorite toy, cheers!