stephenmercedes
Active Member
2001 W203 - My car will need a new battery soon, and I'm just curious, when it's swapped over, will that trigger the need to enter a security radio code which I don't have?
Will a battery change activate the need for radio code?
- Thread starter stephenmercedes
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As far as I know you only need to recalibrate windows steering wheel and sunroof. Batteries tend to not have anything clever to be distinguished. Make sure you have no keys in the ignition
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stephenmercedes
Active Member
No sunroof & manual steering wheel, so all looking good!
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By steering wheel it was meant that you sometimes get a warning about ESP . Brake assist etc being inoperative although I have never had this with changing a battery.
If you get these warnings then turning the steering lock to lock several times and driving the car usually extinguishes them.
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Yep if the ABS light or ESP light are on then you need to calibrate your steering wheel as well
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thebiglad
Active Member
At 2001 almost certainly, but do a search for ways to unlock the radio without the code.
Petrol Pete
Hardcore MB Enthusiast
Even on a 2001 you can sometimes get the code from MB using the VIN.
thebiglad
Active Member
Have a look here : Mercedes - ecoustics.com
When i change batteries on any car I've had i always use a motorcycle battery with fly leads on to connect to the positive / negative on the car while i swop out the bigger car battery, not tried it on a Merc yet but no issues so far.
i have a 1200 Kawasaki with a 12v 16 amp battery which is small and light enough with long fly leads and crocodile clips on to do the job in the past.
D.
i have a 1200 Kawasaki with a 12v 16 amp battery which is small and light enough with long fly leads and crocodile clips on to do the job in the past.
D.
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A 9 volt torch battery will do the trick . Just fit a pair of wires one to the red and then one on to the black contacts and then to the + and - to the leads on the car. Remove the earth clamp first, then the possitive clamp last. Remove old battery ,fit new one in its place , and vis versa on assembly . I keep a bettery booster pack for my jobs like this .
Chrishazle
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On my 2001 S203 there was a spare +ve connection under the bonnet, near side towards the bulkhead, with a red plastic cover. When I needed a new battery I connected a spare battery to this and the top of the suspension for the -ve, then changed the main battery. Remember the battery leads are still live when you disconnect them, so be careful! It removes any need for re-coding etc.! I actually had this done at somewhere like ATS where I bought the battery. I believe it also protects the SAM's from possible problems.
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stephenmercedes
Active Member
Well, took my V5 into the local MB dealership to get a code, and it came up on their computer records that my car does not need a code! Obviously, I'll only ever find out if that's true if on changing the battery, the radio then looks or one! But thought it interesting nonetheless...
MancMike
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You don't have to disconnect the power to change the battery if you don't want.
Just get some twin & earth and use that to connect both batteries in parallel while you move the terminals over.
Just get some twin & earth and use that to connect both batteries in parallel while you move the terminals over.
