I have a 2002 mecedes vito 110 cdi and i need to

Question edited for a lot more clarity, and add maker.
Question moved to maker category.

These are all function of the Body Control Module. You need an auto electrician with a pro grade scan tool computer and access to factory technical bulletins.

https://www.google.com/search?q=mobile+auto+electrician+near+me

No clues in here.

Mercedes-Benz Vito / Viano (W639; 2004-2010) fuses

Fuse Box Diagrams https://fuse-box.info > mercedes-benz > mercedes-ben...
The fuse box is located in the engine compartment on the passenger's side. The location of the fuses in the engine compartment: Mercedes-Benz Vito / Viano.

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Try the Benz Forums. Sounds like overcharge spike.

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buy Electric parts for Mercedes-benz Vito bus (w639) 115 CDI in our ...

https://allparts.me > mercedes-benz > electric parts
Take a look at our selection of Electric parts parts for Mercedes-benz Vito bus (w639) 115 CDI. We provide a guarantee so that you can order with confidence ...

Have no idea aobut the needed recode, but if pinned dowen I would say maybe he is right. the cost in the USA is about $100.00

with a code scanner

if its a manual gear box there is a 14mm hex key plug on the side of the gearbox remove and fill till it overflows then refit plug, If auto you need the service stick from a dealer to check it

It is either under the Windshield Wiper Cover, just forward of the firewall or in the TRUNK of the car.

heres just a guess from me im not for sure it sounds to be a faulty sensor telling your van its over heating when its really not so if your van is not really over heating and its a faulty sensor where is this sensor my guess would be its internal inside of the transmission best thing i can tell you is get a book for your vehicle that tells you step by step how to do things good luck sorry couldnt help you more

http://ww2.justanswer.com/uploads/MBpaul/2009-11-05_155436_112_SUMP.JPG

shows the belt run, low quality but may be enough to do it.

you wont what do you need one for anyway?