So the other day my friend had a new system put in his car in which they messed with all the wiring and stuff. We went to fill up on gas this morning and to our suprise, the gas tank was locked (it's automatic and unlocks with button on key). We figured it's because the new system and all the new wiring but we need to fix it to... well... go places.
We called the place that did the system but we couldn't make it there on our amount of gas, altough he did tell us about some manual override lever or button in the back under a panel that unlocks the gas tank in case of an emergency or something. but we can't seem to find it.
He has a 2001 mercedes benz ML 430 and no owner's manual. we really need to find this manual override and quickly
+k for all help