Electronic Key Intermittant

notdassoir

New Member
Joined
Dec 26, 2011
Messages
3
Car
C Class 220 Elegance
The Electronic Key is intermittant appears to have mind of it's own
 

Gbrowncls55

MB Enthusiast
Joined
Sep 11, 2016
Messages
1,145
Location
Surrey
Car
CLS55 AMG 06, SL350 06, 996 cab, all current. Gone : E500 W211, 2x M5s and far,far too many 911s
usually the batteries. Make sure you use the correct ones. I had the same thing friday. replaced both bateries with new and all well again...so far I believe they are CR 2025 disc batteries
 
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notdassoir

New Member
Joined
Dec 26, 2011
Messages
3
Car
C Class 220 Elegance
Key Batteries were checked and replaced showing 6.5 volts book says to ensure infra red window is clean, but no idea how to. Might try ultrasonic cleaner on Infra red window. But wait - latest attempt with the key released the steering lock but engine would not start for as with both my Mercs if it stands for a few days. The battery is knackered. So I swapped the battery for its big brother and with my higher capacity battery I managed to get the key working to the extent I dare risk driving to be harassed by the happy to see you, now we can sign you up and screw you merchants, lusting for their £50 diag fee.
 

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