Cannot unlock 2001 C180 in mornings HELP

[Redhotmerc]

Hello everyone, just joined today. My 2001 C180 will not unlock in the mornings, remotes don't work, the only way is a manual unlock with the key with setting the alarm off, then by inserting the key fob several times it will eventually release the ignition although the car does not always respond to this action, sometimes 20 to 30 unlock actions on the key fob works but the problem is now getting worse, locked out for an hour today, can anyone help, advise etc. I am technically minded, I have changed all the fobs batteries, all I can think of is it may be the cars battery discharging overnight ?

 

[television]

Welcome to the forum, sorry to hear that you have some problems, I will do some checking later in the day

 

[BlackC55]

Sounds like your key is faulty.

Do you have a spare?

 

[anyweb]

i'd check the car battery as well,

 

[JoeGons]

I am having Central locking problems because of a burnt out Vacuum Pump.
I need to disarm the Alarm/Immobilizer before using the emergency key.
I no longer arm the alarm with the remote. I just manually lock all the doors.
I just don’t press lock on the remote.
Does the central locking/boot unlock work with the cockpit switches?
I’m thinking vacuum pump problems. Worth checking.
Joe

 

[BlackC55]

If its a 202 it will have a vacuum pump. A 203 won't have one. I thinks it a 203.

 

[television]

If its a 202 it will have a vacuum pump. A 203 won't have one. I thinks it a 203.

Perhaps the owner will tell us what it is 202 or 203

 

[anyweb]

if it was built in 2001 its a w203