Morning all,
I have been having issues with my car only when it's cold up until about 50 to 60+ c engine temp.
When starting from cold I let it idle for a minute or so then drive away. After about 50 meters the car will jump or surge forward multiple times in each gear. Even when cruising in each gear the RPM needle sort of bounces up and down a couple hundred RPM. As I'm coming to a stop it feels like the car stays in the engaged gear then there's a faint clunk and then a grinding sound like a rumble strip feeling and sound. As I go to pull away there seems to be a delay before the gear is engaged then the car will lunge forward and almost seem like it will stall.
I've read about multiple things that will cause these symptoms but I just can't find enough info to pin point the problem.
So a few days ago I ordered a dip stick and received it yesterday. This morning I checked the fluid level while cold, after cycling through the gears a few times and with the car idling I checked the level and was shocked!
I found that while the fluid was cold the level comes up almost to where it should be when the fluid is 80c. Could this be the cause of my problems when the car is cold. I haven't checked when the fluid is up to temperature but it's obvious it will be too high!
Even when the car is warm it just doesn't feel like how I imagine a Mercedes would feel to drive, it seems to shift through each gear but it's not smooth it kind of lunges a little as it changes gear. But doesn't lunge while cruising and doesn't hold the gear when stopping although it does feel like it still wants to pull when coming to a stop and makes me feel like I need to apply more brake pressure.
Any help is greatly appreciated, I know I'll need to drain out some fluid immediately but I won't have time until the weekend. I should add that the gearbox was serviced about 6 months ago and the thermostat was replaced and I don't for the life of me remember whether the car didn't feel right before it or not as I wasn't using it much. Then it was off the road for a couple weeks, because the starter motor packed up.
Thanks, James
I have been having issues with my car only when it's cold up until about 50 to 60+ c engine temp.
When starting from cold I let it idle for a minute or so then drive away. After about 50 meters the car will jump or surge forward multiple times in each gear. Even when cruising in each gear the RPM needle sort of bounces up and down a couple hundred RPM. As I'm coming to a stop it feels like the car stays in the engaged gear then there's a faint clunk and then a grinding sound like a rumble strip feeling and sound. As I go to pull away there seems to be a delay before the gear is engaged then the car will lunge forward and almost seem like it will stall.
I've read about multiple things that will cause these symptoms but I just can't find enough info to pin point the problem.
So a few days ago I ordered a dip stick and received it yesterday. This morning I checked the fluid level while cold, after cycling through the gears a few times and with the car idling I checked the level and was shocked!
I found that while the fluid was cold the level comes up almost to where it should be when the fluid is 80c. Could this be the cause of my problems when the car is cold. I haven't checked when the fluid is up to temperature but it's obvious it will be too high!
Even when the car is warm it just doesn't feel like how I imagine a Mercedes would feel to drive, it seems to shift through each gear but it's not smooth it kind of lunges a little as it changes gear. But doesn't lunge while cruising and doesn't hold the gear when stopping although it does feel like it still wants to pull when coming to a stop and makes me feel like I need to apply more brake pressure.
Any help is greatly appreciated, I know I'll need to drain out some fluid immediately but I won't have time until the weekend. I should add that the gearbox was serviced about 6 months ago and the thermostat was replaced and I don't for the life of me remember whether the car didn't feel right before it or not as I wasn't using it much. Then it was off the road for a couple weeks, because the starter motor packed up.
Thanks, James