GAD Tuning Ltd

Brought my AMG C63s in for a remap session. Very professional and sensible approach to tuning including a full diagnostics check, dyno runs before and after and a final road test. No inflated figures just optimised settings for the car within safety tolerances. Results were excellent, more driveable, a huge lift in midrange torque as well as outright power. Highly recommended!

Amazing service with Ant, Good place to get your car tuned and highly knowledgable in this area and very friendly. Will only recommend you to do what is best. Very happy with the tune on my Mercedes E class coupe. Pulling nicely and have not fully opened up yet. Will definitely be taking future cars there.

Excellent service by GAD Tuning. Brought my Mercedes C220 CDI in for a remap and was greeted and provided excellent service in the waiting room. (The driving simulator is very fun to play too!)

Really pleased with the results and was updated throughout the whole process. Will definitely be bringing any future mercs to these guys!

Very happy with results from my c63, I have had another company tune it and I wasn't happy, come onto the dyno and made 527bhp, which was suppose to be 647bhp, it was a mile off with the numbers, come away with 610bhp, 920nm of torque and all I can say is wow, a massive difference and highly recommend gad tunning

Unfortunately had a diesel recall on my vehicle from Mercedes and it negatively affected the fuel consumption and power heavily.

My dad had previously used GADTuning on a W204 C350 (2010) at 40,000 miles. 8 years later the car is on 295,000 miles and still runs like clockwork, so GAD was a no brainer.

Will got in contact with me. And brought me to Anthony in the Essex branch.

Honestly I can’t speak highly enough of GAD and all of the staff. So professional, so knowledgeable, great service and have completely fixed my issues from Mercedes and have also added a very good amount of power.

I’ve recently had a full exhaust system fitted to our Porsche 997 4s. I was advised to get the car remapped to make sure the car was running perfect. I was asking around and GAD Tuning name kept getting mentioned. I gave them a call spoke to a gentlemen called Ant, he was so knowledgeable on the phone and I knew our car was going to be in safe hands.

On arrival I was met by the guys from GAD who talked me through the process showed me their incredible dyno. While GAD Tuning were working their magic I was in the coolest waiting room in history, PS5 hooked up to a racing car simulator, once I realised I was shocking at it I moved over to the huge sofa and watch abit of Netflix.

The car sounded amazing on the dyno and the before and after stats are incredible!

Gad Tuning filmed the whole session and gave me dyno print out for my records.

Driving the car home was epic. It’s been transformed. I can’t speak highly enough of these guys.

Bought my CLS220D down for a tune and was impressed by the the service, knowledge and final product that Will and Ant provide. Nice waiting area with WiFi so I could work whilst Ant did his magic.
The car feels much more responsive making real world driving a breeze and a few extra mpg is the cheery on top. Thanks guys.

Thank goodness for honest knowledgable technicians.
I travelled all the way to GAD from Guildford.
I was all set for a full rolling road session and remap but it was found out I had a low boost warning on the ECU memory .
So without any charge I was advised what to do ( return car to dealer) and I will re book another day.
There was no point placing the car on the rollers.
I offered to pay for their time but was declined.
Very knowledgable technician .
I won’t go anywhere else that’s for sure.
Many thanks GAD tuning!