lights not flashing

hi all,
got into car to come from work tonight and when i unlocked it i noticed the hazards did not flash.tried locking it and the lights flashed as normal but again nothing on the unlock.
also the radio started to switch itself off when any electrical item was used ie indicators or lights.
have done a search on both of these and could not find anything on the hazards not flashing but found mention of the relay for the power supply to the radio and will check this tomorrow.
the car is a 96 300tdi manual.
ps the hazard lights all work fine off the button on the dash.
thanks in advance.

Look in your owners handbook, it will tell u that it is an indication the fob battery is weak.

As above, sign of weak fob battery.