Justin Cracknell Motor Services -  143 C&D Sprowston road, Norwich NR3 4QQ    Tel: Workshop - (01603) 784111 / Mob - 07799 492517




 We regularly undertake vehicle diagnostics and specialist electronic repairs including electronic control module replacement to Mercedes vehicles. If you have an ECU fault with your Mercedes you will be aware that you cannot simply replace your faulty ECU with a secondhand unit as they are programmed (Locked) to your immobiliser system. However we are able to re-program a secondhand ECU by transferring the data files from your original faulty unit. This is known as 'Bench programming' or 'cloning' the donor unit will then simply 'plug & play' with no further programming necessary using your original keys and displaying its correct mileage. We have hundreds of ECU's in stock, please call us to see if we have a compatible unit for your vehicle available. If we don't have a unit in stock or if you have already purchased a secondhand unit & need us to program it to your car we offer an ECU 'cloning' service. ECU cloning starts at 50+vat - Call us for more information and advice on how we can help you with your requirements.

ECU programming

Mercedes ECU's we regularly program

Siemens 5WK9 Series

VDO MSM Series

Mail order service available


Key programming


Remote keys & Infra red keys (IR keys) now supplied & programmed for Mercedes cars & vans!
Please call for full info & prices - if you are looking for a duplicate key or have lost you mercedes car or van key we can program a new one to you vehicle - Express service available (Same day), unlike main dealers that have to order a key from Germany - Click here for full model application list

Mail order service available



 We have large stocks of Mercedes 'Plug & Play' ECU for sale - tested & warranted for 3 months. Fast mail order throughout Europe! Call us anytime or check out our items on Ebay. We accept Paypal & card payments. For fast overnight delivery & information on our latest stock not listed on Ebay please call us...


Mail order service available


Airbag Crash data removal

 We can remove crash data from most airbag control units fitted to Peugeot / Citroen vehicles. Crash data needs to be removed from SRS control units after a car has had collision and a safety feature has been activated such as seat belt pre-tensioners, airbags, fuel cut-off systems etc. This usually appears as the airbag warning light being illuminated and fails to extinguish when garages try to clear fault codes with a standard diagnostic scanner. Simply remove your airbag control unit, bring it to us for stripping and re-programming and usually it will be ready for collection within 24 hours. Crash data removal starts from 40+vat - please call for more info

Mail order service available



Full or part Payments accepted on vehicle purchases & servicing with credit & debit cards 
debit cards are exempt from transaction fee, credit card payments are subject to a 3% charge.


(01603) 784111 - (07799) 492517

 Car keys Norwich - Car keys Kent - Car diagnostics Norwich - Car repairs Norwich

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We can cut & program Mercedes 'Infra red' keys

 Mobile car key cutting / Auto locksmith in Norwich - Norfolk

 Click here for info about car key cutting in Norwich