If the MAF needs replacing, when you put a new one in also check the air box thermostat. On cold days this directs warm air to the intake from near the exhaust manifold via the big silver accordion hose. If the thermostat fails in this position, the MAF receives very hot air when the engine is warm which kills the MAF off before its time.
You can remove the accordion hose and wire the flap if you're not holidaying in Sweden in winter.
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 Present: 1990 240GL saloon, 1992 240 estate
Past: 1988 240GL; 1971 144DL; 1972 145DL
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