A few issues at the same time! - any guidance??

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TrSL55

Member
Joined
Apr 2, 2014
Messages
32
Location
South East
Car
SL55 AMG
OK - have just had a few things happening all at the same time on my SL55 (03)

1)Visit Workshop showing on dash
2) Fuel Gauge fell to zero - (this may/may not be connected to the fact that I filled it up for the 1st time in my ownership!! - previously only run it on half a tank)
3) Boot wont fully close (ie the soft close to pull tight) - therefore roof wont fold down
4) Central locking seems reluctant / intermittent - may open on 3rd key press for example. Currently leaving the car unlocked!

These all occurred Tuesday.

Want to avoid a stealer. Havent a local STAR man so only have more basic codes read which show

P20B7 Increased Idle Speed due to SBC Low Voltage
and
P203A Fuel Tank Level: See tank level sensor (P1999)

I plan to have both the batteries checked for performance as a starting point.

Assuming its not simply a new battery required (could it be??)

What else/next to check?

Thanks!
 
I'm no expert but these all sound like low battery symptoms.
Fuel gauge is common, it will probably right itself, mine does it quite often.

Sorry I can't be more help.
 
The symptoms can also be caused by condensation causing poor circuit integrity - especially if the car is not regularly used. A good long run is sometimes the solution (it often was on my SLK).

Now you know what to do at weekend…..
 
At a guess.

Knackered batteries

Water in the boot buggering up the PSE pump (central locking)
 

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