2021 GLC 43 Cold Start Problem
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Junior Member
Joined: Jul 2021
Posts: 52
Likes: 8
AMG GLC 43
2021 GLC 43 Cold Start Problem
Howdy folks,
Prefacing by stating I am calling the dealer (under warranty) about this but thought maybe some of you can shed light on the following. The car is housed in a garage in the Chicago climate BTW. 2021 AMG GLC 43 with 24k miles and no mods except Renntech exhaust flip module. No prior mechanical issues.
I started noticing a phenomenon that when the weather is cold (around 30F), it takes a few pushes of the ignition button to start the car. Not every time but usually when the car has been "sitting" for several hours and is cold. Everything else looks fine -- the brake is pressed, all the dash lights come on, there are no errors -- but once you press the START button, nothing happens. You then have to press it again in order for the ignition to work. Yesterday, the car was outside for a few hours in the 25-32F temp and the button had to be pressed 4-5 times before the car started. Alternator? Battery was recently checked and is fine. In the summer, the car starts fine every time.
Konstantin
Prefacing by stating I am calling the dealer (under warranty) about this but thought maybe some of you can shed light on the following. The car is housed in a garage in the Chicago climate BTW. 2021 AMG GLC 43 with 24k miles and no mods except Renntech exhaust flip module. No prior mechanical issues.
I started noticing a phenomenon that when the weather is cold (around 30F), it takes a few pushes of the ignition button to start the car. Not every time but usually when the car has been "sitting" for several hours and is cold. Everything else looks fine -- the brake is pressed, all the dash lights come on, there are no errors -- but once you press the START button, nothing happens. You then have to press it again in order for the ignition to work. Yesterday, the car was outside for a few hours in the 25-32F temp and the button had to be pressed 4-5 times before the car started. Alternator? Battery was recently checked and is fine. In the summer, the car starts fine every time.
Konstantin
MBWorld God!
Joined: Dec 2019
Posts: 32,222
Likes: 6,277
Howdy folks,
Prefacing by stating I am calling the dealer (under warranty) about this but thought maybe some of you can shed light on the following. The car is housed in a garage in the Chicago climate BTW. 2021 AMG GLC 43 with 24k miles and no mods except Renntech exhaust flip module. No prior mechanical issues.
I started noticing a phenomenon that when the weather is cold (around 30F), it takes a few pushes of the ignition button to start the car. Not every time but usually when the car has been "sitting" for several hours and is cold. Everything else looks fine -- the brake is pressed, all the dash lights come on, there are no errors -- but once you press the START button, nothing happens. You then have to press it again in order for the ignition to work. Yesterday, the car was outside for a few hours in the 25-32F temp and the button had to be pressed 4-5 times before the car started. Alternator? Battery was recently checked and is fine. In the summer, the car starts fine every time.
Konstantin
Prefacing by stating I am calling the dealer (under warranty) about this but thought maybe some of you can shed light on the following. The car is housed in a garage in the Chicago climate BTW. 2021 AMG GLC 43 with 24k miles and no mods except Renntech exhaust flip module. No prior mechanical issues.
I started noticing a phenomenon that when the weather is cold (around 30F), it takes a few pushes of the ignition button to start the car. Not every time but usually when the car has been "sitting" for several hours and is cold. Everything else looks fine -- the brake is pressed, all the dash lights come on, there are no errors -- but once you press the START button, nothing happens. You then have to press it again in order for the ignition to work. Yesterday, the car was outside for a few hours in the 25-32F temp and the button had to be pressed 4-5 times before the car started. Alternator? Battery was recently checked and is fine. In the summer, the car starts fine every time.
Konstantin
Thread Starter
Junior Member
Joined: Jul 2021
Posts: 52
Likes: 8
AMG GLC 43
Battery has now been replaced. Dealer said old battery condition was "good" but they found it drained when I brought it and recommended I get a battery tenderizer. While I purchased one in the meantime, this is not a convenient way day-to-day to make sure the 12V stays charged. I should not have to be doing that with a relatively new vehicle, ESPECIALLY since I just replaced the battery.
Anyway, the dealer has the car again to figure out once again what's going on. They are saying that if they cannot recreate the problem, they will release the vehicle back to me. Nothing wrong on code scanner per them.
Will see what happens.
Anyway, the dealer has the car again to figure out once again what's going on. They are saying that if they cannot recreate the problem, they will release the vehicle back to me. Nothing wrong on code scanner per them.
Will see what happens.
MBWorld God!
Joined: Dec 2019
Posts: 32,222
Likes: 6,277
Battery has now been replaced. Dealer said old battery condition was "good" but they found it drained when I brought it and recommended I get a battery tenderizer. While I purchased one in the meantime, this is not a convenient way day-to-day to make sure the 12V stays charged. I should not have to be doing that with a relatively new vehicle, ESPECIALLY since I just replaced the battery.
Anyway, the dealer has the car again to figure out once again what's going on. They are saying that if they cannot recreate the problem, they will release the vehicle back to me. Nothing wrong on code scanner per them.
Will see what happens.
Anyway, the dealer has the car again to figure out once again what's going on. They are saying that if they cannot recreate the problem, they will release the vehicle back to me. Nothing wrong on code scanner per them.
Will see what happens.
Newbie
Joined: Jun 2025
Posts: 3
Likes: 0
2019 E300
Hard start no start issue
Had same problem car was towed to dealer multiple times while still under warranty. Tried a trickle charger, dealer installed new battery and checked system and no codes. After 2 years and no resolution sold the vehicle and took huge loss with depreciation on vehicle. MB did not seem interested in really finding the issue and correcting. My suggestion is to buy a Porsche. At least in my experience they have taken time to fix any problems.
MBWorld God!
Joined: Dec 2019
Posts: 32,222
Likes: 6,277
Had same problem car was towed to dealer multiple times while still under warranty. Tried a trickle charger, dealer installed new battery and checked system and no codes. After 2 years and no resolution sold the vehicle and took huge loss with depreciation on vehicle. MB did not seem interested in really finding the issue and correcting. My suggestion is to buy a Porsche. At least in my experience they have taken time to fix any problems.
