WB9AXO
11/5/2006 11:35:41 PM
When the temp goes below 50F, my '98 SLK230 doesn't want to go into drive. It goes into 1st but won't upshift. I can still shift manually between 1 2 & 3 but not 4 or D. Sometimes after 20-30 minutes it starts working correctly. So far suggestions have included the 'transmission speed sensor' and/or trans fluid flush. I haven't taken it to the dealer yet but I'll have to in the next few weeks as it'll be winter soon. Any thoughts?
snanceki
11/6/2006 5:16:12 AM
What does the gearbox DTC's state?
WILD guess....Engine temp sensor?
Upshifts are discouraged until engine warm for emmission reasons. Does you IP read correctly?
Stuart
WB9AXO
11/6/2006 9:37:29 AM
quote:
What does the gearbox DTC's state?
WILD guess....Engine temp sensor?
Upshifts are discouraged until engine warm for emmission reasons. Does you IP read correctly?
Thanks for your reply Stuart.
I don't have access to SW that will read trans codes. Dealer wants $90 just to do that.
Problem seems to be related to OAT rather than engine temp, but that's just a guess.
I don't know what you mean regarding my IP.
I'm aware of delayed upshifts, but this is complete lack of shifting - up or down.
Example: I manually shift into 3rd at 30mph and then put the selector in D. Trans stays in 3rd. I stop at a light. Trans doesn't downshift. When I pull away, trans is still in 3rd.
snanceki
11/6/2006 11:30:39 AM
IP = Instrument Pack. I was asking if the engine temp gauge reads the correct (sort of) temp.
90USD for reading the EMS codes is a bit steep. Most garages should be able to do this in about 5 mins although the STAR diagnostics system does take somewhat longer to set up. Here in the UK MB dealers charge 25GBP if they don't do it for free as a goodwill gesture.
Will think a bit more about this in the next 24hrs.
I assume you have checked the trans oil level. Unfortunately this is also a dealer job.
Stuart
WB9AXO
11/6/2006 12:31:07 PM
quote:
ORIGINAL: snanceki
IP = Instrument Pack. I was asking if the engine temp gauge reads the correct (sort of) temp.
90USD for reading the EMS codes is a bit steep. Most garages should be able to do this in about 5 mins although the STAR diagnostics system does take somewhat longer to set up. Here in the UK MB dealers charge 25GBP if they don't do it for free as a goodwill gesture.
Will think a bit more about this in the next 24hrs.
I assume you have checked the trans oil level. Unfortunately this is also a dealer job.
Stuart
Yes, the temp gauge appears to be correct - about 80C with occasional rise to 90C.
Unfortunately the local (Indianapolis) dealer is one of more expensive in the US. That's what I'm trying to avoid.
Without a trans dipstick, I don't know how to check fluid level although this does seem like a potential cause.
Thanks again for taking the time to ponder.
Cheers,
Chris
WB9AXO
12/1/2006 6:57:09 PM
Took it to the dealer. They diagnosed it as "Shifter internal electrically faulty"
They replaced the shifter mechanism.
Part# 129 260 4598. Parts = $430. Labor = $285 (3 hrs)
Problem resolved.
bazzle
12/2/2006 4:01:39 AM
Good news.
Dipsticks cost about $30.
Have you got a pic off assy changed?
Still a good idea to get a trans flush as well.
Bazzle
WB9AXO
12/2/2006 2:56:11 PM
Sorry, no pics. Dealer wouldn't let me watch. Trans flush after holidays! Where can I get a $30 trans dipstick?
