butthead713

so I get in my car before this ride i took to the store the car was perfect no problems or malfunctions, i get to the store and into the car when i was leaving and i start the car and two errors come up one saying Battery/alternator visit workshop then another one came up saying battery under voltage. so i go to my neighborhood autozone and get a battery test and it read 11.20 volts. i just got my car back about 2 weeks ago from the shop i got a brand new fuel pump and a major tune up so i got a new battery. i leave autozone to go home then my ABS light came on windows wont roll up and lights flickering. can someone tell me whats going on? if i just get a new battery will everything be resolved or do i also need a new alternator?
Please help me guys


Thanks

C280 Sport

The chances are you need a new alternator. 2 weeks after buying my W203 mine needed to be replaced. Same symptoms as what yours had except I was driving down the road at 45mph and it just came on out of no where with a beeping sound.

Glyn M Ruck

You need to check both battery AND alternator

UK-C200

What Glyn said - a battery goes bad for a reason - either it's defective, or it's not being charged. Both tests should be rather straightforward - it only gets complicated if both test "good".