den07
New Member
Hello,
New to the forum and in need of assistance.
I recently took it upon myself to repair a crash damaged/ salvage 2019 Mercedes Benz C200 Mhev EQ Boost.
The car only has 22k miles and was, in my opinion, a steal for the price I paid.
For context:
Vehicle sustained a medium severity front end knock to the NSF corner which deployed both curtain airbags, driver knee bag and the steering wheel airbag.
The interior has now been sorted out and the exterior components are about 90% complete.
However I’m having trouble getting the car to run.
Due to the deployment of airbags I knew that I’d have a few more steps ahead of me to get the car running.
The steps I took during the rebuild stage to get the car to start where :
1) Initially, I tried resetting the crash data on a diagnostic machine, strongly believing that after searching for a pyrofuse and not being able to locate it, that would solve my no crank/ no start issue. The ‘enable engine start after crash’ reset performed successfully somehow but still couldn’t get the engine to start at all.
2) A few days went by and after loosing a decent amount of hair follicles scratching my head, I came across a clip of a gentleman removing a dashboard off of a similar C Class and there it was a pyro fuse behind the glove box. Anyway, I got to the pyro fuse indeed it had blown, I put the two wires together whilst I was waiting for the new fuse to arrive and low and behold the car cranked, started and then it died.
I was confused the engine sounded healthy, it idled very well for the 6 seconds or so that it did.
3) Did some more research, and it occurred to me that the MHEV system is a little more complicated than I originally thought. Not only was the 48V hybrid battery very low on charge but the battery supposedly stored crash date which would permit the engine from starting. So I removed the battery, shipped it to a reputable company to have it reset and recharged and after £400 the battery was back with me.
4) I fitted the battery back to the vehicle, in excitement heading over to finally start it, the car started and then died again
The electric motor continuously tried to keep the engine running but the engine would stall and the electric motor would try and try to kept the engine alive until it would also give up.
So here I am, car won’t run longer than 6 seconds, worried the 48v battery will slowly deplete and with no way to charge it up again.
Please help,
Love you if you can <3
New to the forum and in need of assistance.
I recently took it upon myself to repair a crash damaged/ salvage 2019 Mercedes Benz C200 Mhev EQ Boost.
The car only has 22k miles and was, in my opinion, a steal for the price I paid.
For context:
Vehicle sustained a medium severity front end knock to the NSF corner which deployed both curtain airbags, driver knee bag and the steering wheel airbag.
The interior has now been sorted out and the exterior components are about 90% complete.
However I’m having trouble getting the car to run.
Due to the deployment of airbags I knew that I’d have a few more steps ahead of me to get the car running.
The steps I took during the rebuild stage to get the car to start where :
1) Initially, I tried resetting the crash data on a diagnostic machine, strongly believing that after searching for a pyrofuse and not being able to locate it, that would solve my no crank/ no start issue. The ‘enable engine start after crash’ reset performed successfully somehow but still couldn’t get the engine to start at all.
2) A few days went by and after loosing a decent amount of hair follicles scratching my head, I came across a clip of a gentleman removing a dashboard off of a similar C Class and there it was a pyro fuse behind the glove box. Anyway, I got to the pyro fuse indeed it had blown, I put the two wires together whilst I was waiting for the new fuse to arrive and low and behold the car cranked, started and then it died.
I was confused the engine sounded healthy, it idled very well for the 6 seconds or so that it did.
3) Did some more research, and it occurred to me that the MHEV system is a little more complicated than I originally thought. Not only was the 48V hybrid battery very low on charge but the battery supposedly stored crash date which would permit the engine from starting. So I removed the battery, shipped it to a reputable company to have it reset and recharged and after £400 the battery was back with me.
4) I fitted the battery back to the vehicle, in excitement heading over to finally start it, the car started and then died again
The electric motor continuously tried to keep the engine running but the engine would stall and the electric motor would try and try to kept the engine alive until it would also give up.
So here I am, car won’t run longer than 6 seconds, worried the 48v battery will slowly deplete and with no way to charge it up again.
Please help,
Love you if you can <3
