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Engine idles at 800 but of own accord gradually rise to 2000 then fall back. If I give it a rev when at 2000 they also fall back. This cycle repeats itself. Car drives fine, pulls well. No CEL or fault codes. Have tried unplugging MAF, remoiving filler cap, unplugging purge valve running...

I have a strange repetitive whirr-click noise from front of engine. The car has done this since I bought it 2 years ago. Maybe they all do it but it's quite loud. Sound file here (click download audio) Post info | SndUp Can clearly be heard building up and releasing at 0.05, 0.27 and 0.34. It...

SLK 350. I have the following fault codes up and CEL light on. Cleared and all came back immediately. Suspect they are all linked. To me they indicate there may be a common grounding issue. Or am I barking up the wrong tree here? Car runs fine. Any advice appreciated. Thanks Dave 1186...

I'm considering replacing the big end and main bearings on my SLK320. I'm well aware that it would be better to do a full engine out bottom end rebuild with reground crank, new oil pump etc but I'm on a budget and the rest of the car isn't that special to warrant the cost, it also has 135k...

SRS light has been on for a couple of years. Always assumed seat sensor as it started when I carried a spare wheel in passengers seat. Light comes on with ignition, goes out then comes on again with a bleep and stays on. Console 'airbag off' light goes out. I have bought a supposedly new foam...

My 99 SLK 230K auto has developed an occasional cutting out problem. First time was last night. Reversing into a parking bay and it died (on hot engine after 10 mile run). Span over on the starter very healthily but no sign of firing. Tried it quite a few times then left it for ten mins...