Engine stutter slk r171. 80k miles

bobster1

Active Member
Joined
Jun 15, 2010
Messages
42
Reaction score
0
Location
Motherwell, Scotland
Your Mercedes
SLK200 - 2005 -R171
Please help!!! 2005 slk200 stutters under load. Idle is stable if on motorway ease of gas then firm up engine misses. Seems worse on very cold of wet days. I have recent had fuel pump changed plus Two vac hoses. There are no error lights showing. Last time at indie change of burst vac hose improved running by 90% but still this prob indie says keep till error light shows. Can anyone please suggest solution.
 

moosehead

Senior Member
Joined
Oct 16, 2006
Messages
709
Reaction score
39
Your Mercedes
C230/2005/2.5L Avantgarde SE Sport Pack Estate, SLK230/1999 and Volvo XC60/2017 AWD
What about spark plugs? I had a Ford Cougar V6 before the W203 and the recommended interval between plug changes was 60K miles. A couple of times I had stuttering under load and it was always when the plugs had done about 55K miles. If the R171 is anything like the R170 they are cheap and easy to replace. The last Bosch set I bought from ECP were about £12.
 
OP
B

bobster1

Active Member
Joined
Jun 15, 2010
Messages
42
Reaction score
0
Location
Motherwell, Scotland
Your Mercedes
SLK200 - 2005 -R171
  • Thread Starter
  • Thread starter
  • #3
Thanks for your reply I was thinking about plugs and coils. The plugs were changed about 20k ago. Would there engine management light come on with a plug misfire. I have no malfunctions showing and no error lights
 

moosehead

Senior Member
Joined
Oct 16, 2006
Messages
709
Reaction score
39
Your Mercedes
C230/2005/2.5L Avantgarde SE Sport Pack Estate, SLK230/1999 and Volvo XC60/2017 AWD
Probably unlikely that the engine management light would come on. Plugs are definitely worth a try and relativley inexpensive. Failing that I would seriously consider getting an independent specialist to put it on STAR to see what faults are coming up. This could save you a lot of money in the long run rather than just changing parts in the hope the problem will be fixed.
 
OP
B

bobster1

Active Member
Joined
Jun 15, 2010
Messages
42
Reaction score
0
Location
Motherwell, Scotland
Your Mercedes
SLK200 - 2005 -R171
  • Thread Starter
  • Thread starter
  • #5
Thanks for the reply. Fitted a new set of spark plugs and still car is stuttering. Looks like I will need to see indie
 


AMF Automotive - We are an independent Mercedes-Benz and AMG specialist located in Paddock Wood, Kent, with full Mercedes Diagnostic equipment. We offer a full portfolio of tuning options for AMGs and can cater for all your Mercedes needs.
Tel: 0203 384 4644www.amfmercedes.com/
Top Bottom