central locking and radio keep going of and on

[Britadams]

hi hope someone might be able to help when i first start my car in the mornings my central locking and radio goes off and on few times sometimes a lot very annoying i have had it put on a vcd but didn't show up any faults can anyone help thank you

[Crasher]

And the car is a VW, Audi, Seat, Skoda, Porsche etc from 1936 to the present day?

[Britadams]

Sorry it's 2007 audi a3 2.0tdi

[Crasher]

It sounds like the battery voltage is low, these modern starters will turn over on a very low battery, almost too low to run the engine on a petrol) but its additional drain can make other items act oddly. Start by making sure the battery is fully charged before you try it in the morning and if your battery is the 2007 original it may make sense to replace it before it catches you out somewhere inconvenient.

[Britadams]

hi thanks for reply i get it check. its odd really as only do it when car is cold car always start first time ..