My son is trying to install a Grundig sc 303 rescued from a scrapped car to my car. We find that when we turn the ignition key off for any length of time, we have to recode the radio. I know that when it was installed in the scrapped BMW 525 it was possible to play it even when the ignition was off, although it would switch off by default at the same time as the ignition was switched off, until you switched it back on again. Do we need to run an extra wire direct to the battery to enable the radio to retain its code?

For all makes of radio codes contact this link:

https://www.vivastreet.co.uk/car-parts/hayes-ub4/ford-peugeot-fiat-jaguar-land-rover-mercedes-radio-codes-/117730204

Try google.

Any good car audio repair shop will be able to read the code for you.

your code is 1174

your code is 7283

First make sure that the code has not been noted somewhere within the car (underneath the ash tray, glove box , rear of sun visor etc) 

To see if your code is available here for free then the radio will have to be removed from the dashboard (and if you are lucky, someone may have written the code on the casing ) .

If not then POST ANOTHER QUESTION

quoting the radio MAKE+MODEL plus ALL the LETTERS+NUMBERS on ANY LABELS ,BARCODES or STAMPED IN THE METAL CASING


note: Unfortunately not all radios can be decoded using the Serial Number 

If not then try your Main Dealer ...........or take it into a Decode Service who will plug in a laptop to read/recode the memory chip (EEPROM). This takes a few minutes and shouldn`t be too expensive 

you are dealing with a chip in the key you may remove the cylinder but the car will not restart without programming a new switch in alanwrench

303-07A: Engine Ignition — 3.0L (4V) 2001 Lincoln LS Workshop Manual DESCRIPTION AND OPERATION Engine Ignition The electronic ignition (EI) system is a coil-on-plug (COP) ignition system.
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SECTION 303-07B: Engine Ignition — 3.9L 2001 Lincoln LS Workshop Manual
DESCRIPTION AND OPERATION Engine Ignition The electronic ignition (EI) system is a coil-on-plug (COP) ignition system
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SECTION 303-07B: Engine Ignition — 3.9L 2001 Lincoln LS Workshop Manual
REMOVAL AND INSTALLATION Ignition Coil Removal

1. Remove the air cleaner outlet tube. For additional information, refer to Section 303-12 .

1. Remove the bolts and the ignition coil cover.

1. Disconnect the electrical connector from each ignition coil.

1. Remove the ignition coils.
   1. Remove the bolts.
   1. Remove the ignition coils.

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SECTION 303-07A: Engine Ignition — 3.0L (4V) 2001 Lincoln LS Workshop Manual
REMOVAL AND INSTALLATION Ignition Coil Removal

1. Remove the engine appearance cover.

1. To access the RH bank ignition coils, remove the upper intake manifold. For additional information, refer to Section 303-01A .

1. Disconnect the electrical connector from the ignition coils.

1. Remove the bolts.

1. Remove the ignition coils.

please rate as fixed if this helps.

Is it the orginal key? I had the same problem but found the extra key I had cut was shorter in length than the original, buyed another one and now works great