Depending on the spark plug manufacturer, the plugs for a 1988 Mercedes 190E 2.3 should be gapped between .030" to .032". Bosch and Denso recommend .032", while NGK recommends .030".
This can be due to the spark plug drowning. However, there is also many other reasons why there is no spark.
To remove the spark plug wire in 190e one needs a long nosed plier. Next go for the metal part just above the plugs and grip them tightly and pull up. To fix it all you need to do is to push it with your fingers. Done
The spark plug gap for your Mercedes is .032
the spark plug gap size on a Mercedes e420 is .32
As per page 95 of the owners manual The electrode gap is 0.8 mm (0.032 in)
Do you need a new spark plug??
Changing the spark plug wires in your 1999 Mercedes-Benz is quite simple. The spark plug wires simply lift off. The new spark plug wires can be pushed onto the spark plug. It is best to change one wire at a time.
The recommended spark plug gap for a 1987 Volvo (all models) is .028"
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