Tach problems on cold start
Thread Starter
Newbie
Joined: May 2015
Posts: 8
Likes: 0
From: Council Bluffs, IA
2012 C300 Sport 4MATIC
Tach problems on cold start
First off I just wanted to say hi to everyone here. Have been reading the forum for a while, but have finally bitten the bullet and joined as I have my first problem with my car. I know this forum has a wealth of information so am looking forward to your insight.
I picked up a 2012 C300 sport this past October and everything has gone perfect so far. Am just about ready to take it in for my 40k service but have started to notice something that seems odd that I never noticed prior to a couple of weeks ago.
When I start the car in the mornings the tach jumps up to about 1200rpm and bounces around between 900-1200 for about 45 seconds to a minute before settling back down in the normal 6-700 range. I may have just been ignorant to it in the past but noticed it on a nice morning when I rolled the windows down and heard a louder than normal engine idle. Is this normal for my car or is there something wrong that I should get in for service ASAP? I'm not really much of a car guy so any help is greatly appreciated.
Thanks in advance!
I picked up a 2012 C300 sport this past October and everything has gone perfect so far. Am just about ready to take it in for my 40k service but have started to notice something that seems odd that I never noticed prior to a couple of weeks ago.
When I start the car in the mornings the tach jumps up to about 1200rpm and bounces around between 900-1200 for about 45 seconds to a minute before settling back down in the normal 6-700 range. I may have just been ignorant to it in the past but noticed it on a nice morning when I rolled the windows down and heard a louder than normal engine idle. Is this normal for my car or is there something wrong that I should get in for service ASAP? I'm not really much of a car guy so any help is greatly appreciated.
Thanks in advance!
Thread Starter
Newbie
Joined: May 2015
Posts: 8
Likes: 0
From: Council Bluffs, IA
2012 C300 Sport 4MATIC
That alleviates a lot of my concerns, thanks for your help! I was stressing I would have to shell out a pretty penny to get that fixed if it was an issue.
Hawks didn't look too bad last night, but 3OTs made it a great game to watch, hopefully they can pull through down the stretch here.
Did have another questions that I didn't want to start another thread on, but it is a little off topic from this one. I am coming up on my 40k service, and from reading through some of the other threads believe that I should have a transmission service done with this service which should include a transfer case flush? Again, not a car person but trying to understand the ins and out of my car. How will I know if they actually perform this service compared to a normal transmission fluid replacement? I have seen that there is an additional amount of fluid used for this one 8 vs 6 if I read and remember right. Anything else I should be out on the look for with this 40k one that I am about to go in for?
Again, thanks in advance!
Hawks didn't look too bad last night, but 3OTs made it a great game to watch, hopefully they can pull through down the stretch here.
Did have another questions that I didn't want to start another thread on, but it is a little off topic from this one. I am coming up on my 40k service, and from reading through some of the other threads believe that I should have a transmission service done with this service which should include a transfer case flush? Again, not a car person but trying to understand the ins and out of my car. How will I know if they actually perform this service compared to a normal transmission fluid replacement? I have seen that there is an additional amount of fluid used for this one 8 vs 6 if I read and remember right. Anything else I should be out on the look for with this 40k one that I am about to go in for?
Again, thanks in advance!
Super Member
Joined: Dec 2010
Posts: 846
Likes: 1
From: Fort Myers, Florida
2013 C250 Sport
I'm not 100% sure on the 40k mile since when I got my 2008 it was at 45k miles and my 2013 was at 20k and still only at 25k, so I have never done this service.. Nor have I ever owned a 4matic which has a little different service requirements. I do know that it will most likely cost you more for the service at a MB dealer then going to an Indy shop. May do a little more searching on the site to see what you can find. Or maybe someone will chime in that has a better answer for you sometime this weekend..
And yeah that was a crazy game last night! I loved the part when Shaw thought he was playing soccer!!! He cellyed hard after that no goal!
And yeah that was a crazy game last night! I loved the part when Shaw thought he was playing soccer!!! He cellyed hard after that no goal!
