What is your question?
·
·
What is your question?
Brake lights come on whenever the Ignition is on; motor running or not.
What makes this problem better or worse?
Nothing changes
How long has your 2002 Mercedes-Benz S430 had this problem?
Two weeks
Then the brake lights should be on ALL THE TIME - - even while parked.
Brake light switch failure would be a prime suspect - switch always remains in the closed (ON) position.
Tried everything: even went to Mercedes yesterday. They scanned and could only guess the ESP. Exchanged new brake light switch with the one in wife's 430e. New one worked in hers; hers didn't work in my vehicle? Defiantly not switch.
Very unusual indeed. Well I’m out of ammo. Good luck with it!
Absolutely; Tried everything: even went to Mercedes yesterday. They scanned and could only guess the ESP. Exchanged new brake light switch with the one in wife's 430e. New one worked in hers; hers didn't work in my vehicle? Defiantly not switch. Don't know what to do next? Study the ESP module?