firstly ide like to apologies for the likleyhood that this is posted in the wrong place, im new to the forum but il figure it out
im looking for any advice on the issues ive been having with my 2003 slk 230 r170 (automatic)
most signs have pointed to the gearbox but its a big job to change and ide like to look for other causes, any ideas would be greatly appreciated.. heres the situation:
(the first section may not be relevant except it relates to electrical issues which may be [hopefully] whats caused my current problem somehow)
1- old issue
around 4 months ago the central locking suddenly stopped working (hasn't since but dosnt bother me as i dont like waking up to tend to car alarms much anyway)and at the same time the abs light came on and the traction control button became unresponsive. i took the car to a local garage who changed two rear speed sensors (which read from reluctor rings) and a third sensor for air intake temperature which was bringing up a fault code also.
The abs and esp worked for about a week and the abs/esp light came on again, same symptoms.. i went to the same garage who told me the offside rear reluctor ring was damaged and missing a small piece "probably a stone chip" i left this for a week as it seamed unimportant but the problem went away on its own. a month late the check engine light came on and i called the aa before starting it, they told me this was because of the reluctor ring and not to worry. i left it at that. days later it was gone and not heard from since.
2- current issue (help XD)
two weeks ago the car started to make a whining sound when accelerating and decelerating, it was barley noticeable on day 1 and very clear on day 2 (driving around an hour one each). driving on the third day (to my mechanics) i noticed that the car changed a single gear later than it normally would, moments later drive was temporally lost i was reving the engine but effectively no clutch, when trying to change gear manually (this version of the r170 has a sequential electronic stick) nothing happened. i pulled over and noticed that upon engaging drive the car no longer "sat down" infact it was like stick did nothing. after a 10 minuet cool-down it was able to move again but only a few 100 yards.
i had it recovered and the garage changed the oil in the gearbox as well as replacing the filter. the car was fine untill the other night (10 days since oil) when the problem came back, this time the heater stopped working as well (not cold but stopped completely). i suspected something with the battery (because i know how old mercs feel about less than perfect batterys
) so today i took it to a local friendly battery tester who told me it was running fine on amps and volts.
im now left looking at a potential major issue with the gearbox, hopefully someone can suggest otherwise, heres some shots int eh dark ide like to rule out or pop in the maybe pile with your help..
ecu / tcu etc.